William de Tickhill was a 14th century English cleric, Crown official, and judge. The clergy in the Middle Ages were very important and influential in society. Some, including William, even had great political power.
William took his name from his birthplace in Tickhill, which lies 8 miles south of Doncaster, in South Yorkshire. At that time Tickhill was the second most important town in that area.
In 1316 he was a cleric at Steeple Morden in Cambridgeshire, and then, in 1317, to Bolton. He was appointed Keeper of the Royal Wardrobe in 1320. Later he was sent abroad on royal business.
In 1331, he was appointed Chief Baron of the Irish Exchequer. The Chief Baron was the senior judge who sat at the court, and it was partly a political position. William only served for a few months in that office before returning to England. By the end of that same year he was sitting on a Royal Commission.
He retained a link with Ireland and, in 1332 he became a prebendary, a sort of canon, in the Diocese of Ossory, Leinster.
He went abroad on official business with Richard de Bury, Bishop of Durham in 1336. He later became vicar of Stanhope, in County Durham, and warden of Grantham Hospital. He spent much of his later years in York and, in 1357, was given permission to found a guild in the city.