William de Westbury

William Westbury (c. 1385 – 1448/49), also called William de Westbury and William of Westbury, was a fifteenth-century judge of the King's Bench.

Career William de Westbury was for many years the steward of the manor of Castle Combe, near Chippenham, Wiltshire, and during that time was noted as being a lawyer by profession. He was appointed Sergeant-at-law in 1418 (after refusal of the position in 1415; As a consequence of insufficient numbers of Sergeants, a large penalty was imposed by Parliament upon persons refusing the summons.

Family Westbury was the son of John de Westbury, of Westbury, and John de Westbury, a member of parliament for Wiltshire, was his younger brother. and their children include Agnes de Westbury, who married Robert Leversegge.

Westbury inherited the manor of Sewell (Sewells, Shewells, Sewelles) from William FitzWarin, probably as a result of his marriage into the family, and continued to hold it until his death. In the 16th year of King Henry VI (1438–39) they granted "...messuages, land, and rent in Westbury and Honybrigge to the chaplain of his new chapel in Westbury church, retaining land in Westbury, Wiltshire". William bequeathed his body to be interred in a tomb in the new chapel on the north side near the inner vail under a glazed window within this church.