William le Boteler of Bewsey, Baron of Warrington was born circa 1376 in England, United Kingdom to John le Boteler (c1340-1400) and Alicia de Plumpton (c1338-c1400) and died 26 September 1415 England, United Kingdom of unspecified causes. He married Elizabeth Standish (-1441) .
Siblings
| Name | Birth | Death | Joined with |
| John le Boteler (c1365-aft1415) | |||
| Alice le Boteler (c1375-c1441) | |||
| William le Boteler (c1376-1415) | 1376 England, United Kingdom | 26 September 1415 England, United Kingdom | Elizabeth Standish (-1441) |
| Elizabeth le Boteler (c1379-) | 1379 | Piers de Dutton (c1367-1433) | |
| Margaret le Boteler (1379-1450) | |||
Children
| Name | Birth | Death | Joined with |
| John le Boteler (1402-) | 26 February 1402 Bewsey, England | 12 September 1430 England | Isabel Harrington (c1410-1441) |