| William Mollison | VH9F8YVANX | topic | open | Wikipedia William Mollison (mathematician), Wikidata Q58847691 |
| William Morgan | E3YS6TTKY0 | unknown | open | Wikipedia List of actuaries#JG4Y |
| William Morris Kinnersley | F5G5GXE7KF | unknown | open | Wikipedia List of contributors to general relativity#854Y |
| William Morton Kahan | 498R7MXH97 | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#E9OC |
| William Neile | A0BW65E5WF | topic | open | Wikipedia William Neile, Wikidata Q4321312 |
| William of Ockham | 5N4XV71RMV | topic | open | Wikipedia William of Ockham, Wikidata Q43936 |
| William of Ockham | SMR1Q1ZHK0 | topic | open | Wikipedia List of logicians#QK0O |
| William of Sherwood | 2NJQDSS9GV | topic | open | Wikipedia William of Sherwood, Wikidata Q325650 |
| William of Sherwood | AJNRY24361 | topic | open | Wikipedia List of logicians#QXC7 |
| William of Soissons | YRN35SXR5X | topic | open | Wikipedia William of Soissons, Wikidata Q45285670 |
| William of Soissons | YXZ8SKYQ8N | topic | open | Wikipedia List of logicians#ZE56 |
| William Ouchi | GBGRKQ1QCC | unknown | open | Wikipedia List of University of California, Los Angeles people#3T3A |
| William Oughtred | F51NCPQEQC | topic | open | Wikipedia William Oughtred, Wikidata Q311491 |
| William P. Byers | 9ZA2VNHTZH | topic | open | Wikipedia William P. Byers, Wikidata Q8016443 |
| William Palin Elderton | C9PTJ15RXN | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#5R3F, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#5V3T |
| William Palin Elderton | YJ06A2CKZB | unknown | open | Wikipedia List of actuaries#EBBI |
| William Paul Thurston | C9AWSB1EAD | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#Q0RV |
| William Payne | 1D4QE79K42 | topic | open | Wikipedia William Payne (mathematician), Wikidata Q8016700 |
| William Peddie | SVY1NT22H6 | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#801X |
| William Petty | 2T7PY5JG9N | unknown | open | Wikipedia List of actuaries#RNTJ |
| William Pitt Durfee | 67QQWDZ3SC | topic | open | Wikipedia William Pitt Durfee, Wikidata Q8016938 |
| William Playfair | QQQ39ZGXQA | topic | open | Wikipedia William Playfair, Wikidata Q738532 |
| William Prager | 3012RMQRYD | unknown | open | Wikipedia List of German mathematicians#VFR7 |
| William R. Johnson | REYRR7Y0PA | unknown | open | Wikipedia List of University of California, Los Angeles people#IZXL |
| William R. Peers | TJCT57SNWN | unknown | open | Wikipedia List of University of California, Los Angeles people#PKJX |
| William R. Pulleyblank | 3GT0CKG0AN | unknown | open | Wikipedia List of people by Erdős number#7TLO, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#HAZM |
| William R. Steiger | 95GZWVT8R7 | unknown | open | Wikipedia List of University of California, Los Angeles people#L8IJ |
| William Rae Thompson | 9KXH9J6C83 | topic | open | Wikipedia William Rae Thompson, Wikidata Q102198379 |
| William Rae Thompson | K2MJG6C2C3 | topic | open | Wikipedia List of fellows of the American Statistical Association#L95V |
| William Reginald Dean | 6P2T6BE4XE | topic | open | Wikipedia William Reginald Dean, Wikidata Q7945907 |
| William Revelle | 27GKT7B7RQ | topic | open | Wikipedia William Revelle, Wikidata Q16221599 |
| William Rowan Hamilton | J7PYBAT448 | topic | open | Wikipedia List of mathematicians born in the 19th century#NDNI |
| William Rowan Hamilton | JNH5YMXSGR | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q11887, nLab William Rowan Hamilton, ProofWiki Mathematician:William_Rowan_Hamilton, Wikipedia William Rowan Hamilton |
| William Ruggles | WYG5PBBJRJ | topic | open | Wikipedia William Ruggles, Wikidata Q8017830 |
| William S. Burnside | 5CGZT6XNTA | topic | open | Wikipedia William S. Burnside, Wikidata Q74733538 |
| William S. Cleveland | RBY9PM6E03 | unknown | open | Wikipedia List of fellows of the American Statistical Association#XH22 |
| William S. Massey | VJWME7SX79 | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q8017979, nLab William S. Massey, Wikipedia William S. Massey |
| William S. Zwicker | 3M8NF58054 | topic | open | Wikipedia List of people by Erdős number#FD0R |
| William S. Zwicker | FDD8B7QWWJ | topic | open | Wikipedia William S. Zwicker, Wikidata Q4020188 |
| William Sanders | KMEB22PBNN | topic | open | Wikipedia William Sanders (statistician), Wikidata Q8018102 |
| William Schieffelin Claytor | 24JHYW77N9 | topic | open | Wikipedia William Schieffelin Claytor, Wikidata Q12898324 |
| William Schmidt | S6XVQBH5Q0 | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#UFUX |
| William Scott Klug | QQDHCN3PAJ | unknown | open | Wikipedia List of University of California, Los Angeles people#XEGN |
| William Sealy Gosset | AD23VBWDQ1 | topic | open | Wikipedia William Sealy Gosset, Wikidata Q334375 |
| William Shadish | 2FYYMBAHW0 | topic | open | Wikipedia William Shadish, Wikidata Q54818644 |
| William Shaw | 3YXHKB28HF | topic | open | Wikipedia William Shaw (mathematician), Wikidata Q8018341 |
| William Sidis | J1E9GN4X5G | topic | open | Wikipedia List of Jewish mathematicians#TB3S |
| William Spence | NQPAWCJ1S9 | topic | open | Wikipedia William Spence (mathematician), Wikidata Q23647822 |
| William Stanley Jevons | 75CWPSR6B6 | topic | open | Wikipedia William Stanley Jevons, Wikidata Q312546 |
| William Stanley Jevons | YNXHAG7BWC | topic | open | Wikipedia List of logicians#OAZO |
| William Stone Weedon | ZZKME2XNHP | unknown | open | Wikipedia List of cryptographers#JY4O |
| William T. Trotter | 4285FYVN7B | topic | open | Wikipedia William T. Trotter, Wikidata Q16886198 |
| William T. Trotter | DBZWX028PC | topic | open | Wikipedia List of people by Erdős number#ZQP7 |
| William Thomas Fletcher | NN20G8YECG | topic | open | Wikipedia William Thomas Fletcher, Wikidata Q10987773 |
| William Thomas Tutte | 3WVPR4V28K | topic | open | Wikipedia List of cryptographers#BH1T |
| William Thomson | HFZDC8PMHY | topic | open | Wikipedia William Thomson (mathematician), Wikidata Q37738118 |
| William Threlfall | 1C0BT2PXQQ | topic | open | Wikipedia William Threlfall, Wikidata Q87109 |
| William Threlfall | TCRM6ZQA86 | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#DP77, Wikipedia List of German mathematicians#FVXK |
| William Thurston | 8C9P9R67JT | topic | open | Wikipedia List of geometers#QSNZ |
| William Thurston | H3RZE7M2W3 | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q333927, nLab William Thurston, Wikipedia William Thurston |
| William Thurston | H8HXAHTM7S | topic | open | Wikipedia List of people by Erdős number#QKX8, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#NMBD |
| William Timothy Gowers | G1E8N11TAY | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#XM6N |
| William V. Mayer | DQRPKX3FJA | unknown | open | Wikipedia List of University of California, Los Angeles people#NSH4 |
| William Vallance Douglas Hodge | C3EJK2583P | topic | open | Wikipedia List of geometers#XOIW |
| William Vann Parker | 4BGFREYNYF | topic | open | Wikipedia William Vann Parker, Wikidata Q102145056 |
| William W. Tait | XQAE3245YT | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q8019843, nLab William Tait, Wikipedia William W. Tait |
| William Wales | T3YSK77J7P | topic | open | Wikipedia William Wales (astronomer), Wikidata Q432189 |
| William Wallace | HFV7CCD5WM | topic | open | Wikipedia William Wallace (mathematician), Wikidata Q921869 |
| William Whewell | 9SKWQD3X3D | topic | open | Wikipedia William Whewell, Wikidata Q333922 |
| William Whiston | TMTGB2EXJW | topic | open | Wikipedia William Whiston, Wikidata Q452091 |
| William Whyburn | 82HF6CZW17 | topic | open | Wikipedia William Whyburn, Wikidata Q37634085 |
| William Wilson Hunter | P2N17341XG | topic | open | Wikipedia William Wilson Hunter, Wikidata Q724677 |
| William Woolsey Johnson | JCQS2QVX3J | topic | open | Wikipedia William Woolsey Johnson, Wikidata Q21982809 |
| William Wootters | KHQTTA4CSS | unknown | open | Wikipedia List of people by Erdős number#GP7U |
| William Zame | G88VKX6KM0 | topic | open | Wikipedia William Zame, Wikidata Q28862612 |
| Williams number | 167ASRWXHW | definition | open | Wikipedia Williams number, Wikidata Q60788492 |
| Williams prime | ACM2PERVXK | definition | open | Wikipedia List of prime numbers#9HSY |
| Williams's p + 1 algorithm | P15YVEDPES | definition | open | Wikipedia Williams's p + 1 algorithm, Wikidata Q4046134 |
| Williamson conjecture | 8X9XXEMCVF | statement | open | Wikipedia List of conjectures#JI2E |
| Williamson conjecture | P06NS2S7Y6 | statement | open | Wikipedia Williamson conjecture, Wikidata Q85815823 |
| Williamson theorem | 3MHQHB2YW3 | statement | open | Wikipedia Definite matrix#0U5H |
| Williamson theorem | R3Z7F34KWH | statement | open | Wikipedia Williamson theorem, Wikidata Q129164494 |
| Williamson's theorem | DYB2DCGCE1 | statement | record (an item of a paper that no node asks for yet. The record keeps its edges in the record plane (corpus arxiv AX8.6)) | arXiv 2610.01855#DXOW |
| Willis Lamb | H8T7T273M8 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q186497, nLab Willis Lamb |
| Willis Lamb | TMT8HHQKZ5 | unknown | open | Wikipedia List of people by Erdős number#AE2T |
| Willmore conjecture | F6XSQS9913 | statement | open | Wikipedia Willmore conjecture, Wikidata Q17091514 |
| Willmore conjecture | YRH8066PR7 | statement | open | Wikipedia Willmore conjecture#7HLL |
| Willmore energy | 4CKADJ9FTS | definition | open | Wikipedia List of differential geometry topics#N070 |
| Willmore energy | AMXK648KEV | definition | open | Wikipedia Willmore energy, Wikidata Q2581692 |
| Willmore flow | GTXA40WBZN | unknown | open | Wikipedia Willmore energy#08HP |
| Willmore flow | HX14JM1XQK | definition | open | Wikipedia List of differential geometry topics#6QTM |
| Willmore surface | PZGP2A92NG | unknown | open | Wikipedia Willmore energy#KMG1 |
| Willy Feller | 6H803BJQCE | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#47U8 |
| Willy Fischler | CET948F9NT | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q2169476, nLab Willy Fischler |
| Willy Fischler | WGZTF6Z1EY | unknown | open | Wikipedia List of string theory topics#3J4E |
| Wilma Z. Davis | SJ2WHK5W0Z | topic | open | Wikipedia Wilma Z. Davis, Wikidata Q51852352 |
| Wilson | SDQSM1CBAQ | statement | record (an item of a paper that no node asks for yet. The record keeps its edges in the record plane (corpus arxiv AX8.6)) | arXiv 2610.04305#CIDP |
| Wilson Formula: Lake Garda | B0XD6DSESN | statement | open | Wikipedia Wind wave model#LRMZ |
| Wilson line | KRZJJRY90D | definition | open | Wikipedia List of mathematical topics in quantum theory#SWJY |