Jean Le Roy, Regis, was a master of arts at Paris in 1403, a student in his fourth year under the Faculty of Law in 1416, and priest in the diocese of Meaux.

An account of "Johannes Regis," canon of the church of Rouen, called also master of wills, was made for 1433-1434, and 1434-1435.

A Jean Le Roy, canon, promoter of Rouen, curé of Londinières and later of Bourdainville, 1429-1430, is described as promoter during the vacancy of the See on December 13, 1429.

He died January 25, 1460.