Foster: Martin, William, s. William, of Long Combe, Oxon, pleb. Balliol Coll., matric. 10 May 1638, aged 16; BA 1 Feb. 1641-2, created MA 2 Dec. 1642.
The ordination as deacon takes place a long time after graduation, but, in 1662, this is not implausible; odder is the gap of 11 years before ordination as priest. But there is no other WM of Balliol in Foster.