William, treasurer of York Minster

Presumptive brother of Matilda de Clere.
Mentioned, with no family name, in charters and accounts 1218-1222. Succeeded as treasurer by 19 June 1222, by one William de Rotherfield. (There were three Williams active in the York ecclesiastical hierarchy circa 1220, per a charter of Archbishop Gray dated 3 Sep. 1220, witnessed by William 'the treasurer,' William 'Archdeacon of the East Riding,' and William 'Archdeacon of Richmond' - that last apparently being de Rotherfield and the other two being of unknown families.)

Extensive and inconclusive discussion here: https://groups.google.com/forum/#!topic/soc.genealogy.medieval/EDth...