| John Hammersley | N02RPV49TB | topic | open | Wikipedia John Hammersley, Wikidata Q1382531 |
| John Hazzidakis | 361TR6QMV7 | topic | open | Wikipedia John Hazzidakis, Wikidata Q16329306 |
| John Hempel | CQJ6Q4RPVN | topic | open | Wikipedia John Hempel, Wikidata Q102128847 |
| John Henry Newman | PM2X7FRPR9 | unknown | open | Wikipedia List of logicians#C9VU |
| John Henry Poynting | WV1T8T5S9H | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#HLDI |
| John Hershberger | STGHCS0915 | unknown | open | Wikipedia List of people by Erdős number#RPRO |
| John Hewitt Jellett | WE5Z55JEVQ | topic | open | Wikipedia John Hewitt Jellett, Wikidata Q6239156 |
| John Heysham | TBG62H62DW | topic | open | Wikipedia John Heysham, Wikidata Q15994511 |
| John Hilton Grace | ECCA1T6H6H | topic | open | Wikipedia John Hilton Grace, Wikidata Q10966036 |
| John Hind | 6YC1F24TT6 | topic | open | Wikipedia John Hind (mathematician), Wikidata Q6239342 |
| John Holwell | WBVFBR76FP | topic | open | Wikipedia John Holwell, Wikidata Q6239711 |
| John Hopcroft | 67DEXQ7GA1 | unknown | open | Wikipedia List of people by Erdős number#1F4X |
| John Horton Conway | 9NBB2PJQTD | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q268961, nLab John Horton Conway, ProofWiki Mathematician:John_Horton_Conway, Wikipedia John Horton Conway |
| John Horton Conway | DZQDEWYT3P | topic | open | Wikipedia List of people by Erdős number#UGSY, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#8AUQ, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#GL4H, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#Z1Z5 |
| John Horton Conway | G4ASK3SZ90 | topic | open | Wikipedia List of publications in mathematics#4IIB |
| John Horvath | AZQXDPRQWG | topic | open | Wikipedia John Horvath (mathematician), Wikidata Q27994483 |
| John Hudson | 61PSZVK226 | topic | open | Wikipedia John Hudson (mathematician), Wikidata Q6240251 |
| John Iacono | Y8XGXXMW59 | unknown | open | Wikipedia List of people by Erdős number#NS8H |
| John Irwin Hutchinson | WSK94R7DY6 | topic | open | Wikipedia John Irwin Hutchinson, Wikidata Q6240890 |
| John Irwin Hutchinson | ZS26HTGPDG | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#WUPT |
| John J. Deely | Z6YW4TJYE1 | unknown | open | Wikipedia List of fellows of the American Statistical Association#QBPG |
| John J. Millson | NZX6D6T3QE | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#CKIK |
| John Jardine | QB6KZJR8HT | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q15456834, nLab John Frederick Jardine, Wikipedia Rick Jardine |
| John Jay Gergen | 9E4HR35VHB | topic | open | Wikipedia John Jay Gergen, Wikidata Q720428 |
| John Joseph Rochefort | KBJMV4XZRF | unknown | open | Wikipedia List of cryptographers#CF8H |
| John K. Kruschke | 4N9HKA1SCW | topic | open | Wikipedia John K. Kruschke, Wikidata Q108765658 |
| John Kells Ingram | HX9AKY0N9R | topic | open | Wikipedia John Kells Ingram, Wikidata Q972178 |
| John Kemeny | NB1WSDS22K | unknown | open | Wikipedia List of Jewish mathematicians#S7ZB |
| John Kemp | 4EMGRYK4CZ | topic | open | Wikipedia John Kemp (mathematician), Wikidata Q18671911 |
| John Kersey the elder | Y1PMQHNW7C | topic | open | Wikipedia John Kersey the elder, Wikidata Q3181865 |
| John Kieffer | E2XD2E43X2 | topic | open | Wikipedia John Kieffer, Wikidata Q112109219 |
| John Kim | D6PN970G1K | unknown | open | Wikipedia List of University of California, Los Angeles people#B1U3 |
| John Kingman | PNAH1J2FJD | unknown | open | Wikipedia List of people by Erdős number#6070 |
| John Koren | 39H7WYRJQY | topic | open | Wikipedia List of fellows of the American Statistical Association#GZRH |
| John Koren | QE4DZXT21S | topic | open | Wikipedia John Koren, Wikidata Q106977247 |
| John L. Horn | AX59NE4V1Y | topic | open | Wikipedia John L. Horn, Wikidata Q6243608 |
| John L. Kelley | VCDNS40BH9 | unknown | open | Wikipedia List of people by Erdős number#ZP1T |
| John L. Pollock | BDDNZ390A6 | topic | open | Wikipedia John L. Pollock, Wikidata Q6243668 |
| John Landen | GG5FP5EXSR | topic | open | Wikipedia John Landen, Wikidata Q1398963 |
| John Lane Bell | 6T9BXQ6KAR | topic | open | Wikipedia List of people by Erdős number#4ACL |
| John Lane Bell | GBXB3KWZV6 | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q6243948, nLab John Lane Bell, Wikipedia John Lane Bell |
| John Lane Bell | KZA5BSFMQH | topic | open | Wikipedia List of logicians#M139 |
| John Laurence Pritchard | Y0AX1XV1YY | topic | open | Wikipedia John Laurence Pritchard, Wikidata Q16028169 |
| John Law | DMFS93XEFZ | topic | open | Wikipedia John Law (bishop), Wikidata Q6244138 |
| John Lee Coulter | EJGHZBQ5JX | unknown | open | Wikipedia List of fellows of the American Statistical Association#4QVG |
| John Leech | G4KNPXKKZW | topic | open | Wikipedia List of people by Erdős number#VMPO |
| John Leech | GQS28ANK1S | topic | open | Wikipedia List of geometers#GBWK |
| John Leech | RTZZ1ZGW89 | topic | open | Wikipedia John Leech (mathematician), Wikidata Q930817 |
| John Leigh Smeathman Hatton | JQVCNZZKVE | topic | open | Wikipedia John Leigh Smeathman Hatton, Wikidata Q16029198 |
| John Lemmon | 7E9J1K4D4E | topic | open | Wikipedia John Lemmon, Wikidata Q6244518 |
| John Lennox | 3H1634CSSK | topic | open | Wikipedia John Lennox, Wikidata Q975795 |
| John Lewis Tiarks | YZPB5FTBQ4 | topic | open | Wikipedia John Lewis Tiarks, Wikidata Q1695378 |
| John Lighton Synge | 5VHRCYA4R1 | topic | open | Wikipedia John Lighton Synge, Wikidata Q364650 |
| John Lighton Synge | 6BQBF2JBRE | topic | open | Wikipedia List of contributors to general relativity#SST7 |
| John Lighton Synge | JWEF6B0DZH | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#89IH, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#DCQ0, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#XZ8I |
| John Little | X4MAVK5JAM | unknown | open | Wikipedia List of people by Erdős number#A9V4 |
| John Lomas | T7AHMNDCT6 | topic | open | Wikipedia John Lomas (RAF officer), Wikidata Q84590783 |
| John M. Abowd | 4C170G28QR | unknown | open | Wikipedia List of fellows of the American Statistical Association#JG0O |
| John M. Ball | 3MP5S54XT2 | topic | open | Wikipedia List of people by Erdős number#V2RB |
| John M. Ball | XP5HHFBEB8 | topic | open | Wikipedia John M. Ball, Wikidata Q667583 |
| John M. Chambers | RJ6DXXT6DQ | topic | open | Wikipedia List of fellows of the American Statistical Association#EY0C |
| John M. Sullivan | Q8M2G2S0K1 | topic | open | Wikipedia John M. Sullivan (mathematician), Wikidata Q19539046 |
| John M. Sullivan | SBRVD63AAJ | topic | open | Wikipedia List of people by Erdős number#W5JN, Wikipedia List of German mathematicians#C3M6 |
| John Machin | QQMM6NHZ5G | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q726385, MathWorld MachinsFormula, Wikipedia John Machin |
| John Mackintosh Howie | 147VJ9PW3M | topic | open | Wikipedia List of people by Erdős number#8OSN |
| John Mackintosh Howie | 6V48EKQT73 | topic | open | Wikipedia John Mackintosh Howie, Wikidata Q195865 |
| John MacLeod Ball | X5CF6H3PPK | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#N98L |
| John Mair | XXGN0D9JZ2 | topic | open | Wikipedia List of logicians#E5GP |
| John Major | WBZPC6P6VZ | topic | open | Wikipedia John Major (philosopher), Wikidata Q579194 |
| John Mallet-Paret | E1NN1B5TXQ | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#YW5U |
| John Mauchly | DJNDJCB8ST | unknown | open | Wikipedia List of fellows of the American Statistical Association#MU28 |
| John Maynard Keynes | 9XKENSPMZR | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q9317, EoM Keynes,_John_Maynard |
| John Maynard Keynes | C677YV6A9D | unknown | open | Wikipedia List of mathematical probabilists#A45D |
| John McCarthy | YNK1MAFDDE | topic | open | Wikipedia John McCarthy (mathematician), Wikidata Q59503548 |
| John McKay | 20DK5WA291 | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q1701035, nLab John McKay, Wikipedia John McKay (mathematician) |
| John McKay | W1MKVX81J0 | topic | open | Wikipedia List of people by Erdős number#JWA5 |
| John McQuown | MDZ2JVKGM9 | unknown | open | Wikipedia Merton model#Y9OA |
| John McWhirter | GXRRKEZRXJ | topic | open | Wikipedia John McWhirter (mathematician), Wikidata Q6248332 |
| John Meadows Jackson | P05F1G6D0F | topic | open | Wikipedia John Meadows Jackson, Wikidata Q28180299 |
| John Merrick | 3DZS62TFZ4 | unknown | open | Wikipedia List of University of California, Los Angeles people#23QY |
| John Mighton | S25QE2ZF5M | topic | open | Wikipedia John Mighton, Wikidata Q10966284 |
| John Milnor | M1YN6YW15P | topic | open | Wikipedia List of geometers#6TEU |
| John Milnor | QQP21GXWAE | topic | open | Wikipedia List of people by Erdős number#3XMK, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#Q241, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#UJM1 |
| John Milnor | Y7YG3JVRYB | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q215765, nLab John Milnor, Wikipedia John Milnor |
| John Moffat | 4ZYK8BDGF6 | unknown | open | Wikipedia List of contributors to general relativity#FS6G |
| John Montroll | 8W38ENBMN0 | topic | open | Wikipedia John Montroll, Wikidata Q4302153 |
| John Morgan | FFR2YV34HV | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q139214, nLab John Morgan, Wikipedia John Morgan (mathematician) |
| John Mueller Anderson | 9KG8BYJXC4 | topic | open | Wikipedia John Mueller Anderson, Wikidata Q60677383 |
| John Myhill | FSWNTMDV6H | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q402579, nLab John Myhill, Wikipedia John Myhill |
| John Myhill | TWKX8DBMTF | topic | open | Wikipedia List of people by Erdős number#59NK |
| John Müller | CVY0FBVFBB | topic | open | Wikipedia List of German mathematicians#UY5Q |
| John Müller | S8V97NXJ93 | topic | open | Wikipedia John Müller, Wikidata Q18732185 |
| John N. Mather | 42BTJKVVPF | unknown | open | Wikipedia List of people by Erdős number#I13V, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#7TR8, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#VMIK |
| John N. Shutt | BWQRRAXHSD | unknown | open | Wikipedia Adaptive grammar#PQVS |
| John Napier | X36NCGR77K | topic | open | Wikipedia John Napier, Wikidata Q159592 |
| John Nelder | YAGV53NXSN | topic | open | Wikipedia John Nelder, Wikidata Q1630150 |
| John Nelson Stockwell | TG07TV6B53 | topic | open | Wikipedia John Nelson Stockwell, Wikidata Q16912339 |
| John Nesselroade | 14WCP2Z0K0 | topic | open | Wikipedia John Nesselroade, Wikidata Q58975160 |
| John Neter | 6E9JD8HV6P | unknown | open | Wikipedia List of fellows of the American Statistical Association#S3CU |
| John Newsome Crossley | F4ZVX898XC | topic | open | Wikipedia John Newsome Crossley, Wikidata Q6227761 |