Withiel came from a family which took its name from their native parish some miles to the west of Bodmin. John himself is not known to have resided there, instead making his home in the prosperous town of Bodmin itself, where he practiced the trade of a goldsmith.
By virtue of a marriage contracted in the mid fourteenth century the Withiels were related to the influential Flamanks of Boscarne. The two families apparently continued to be on cordial terms into the 1430s, and in 1437 Withiel found sureties for the attendance in Parliament of his kinsman James Flamank*, who had been elected a Member for Bodmin.
