Jean De Bethencourt III

Jean De was born in 1340 in Picardia (França).  Jean De's father was Jean De Bethencourt II and his mother was Isabeau De Saint Martin.  His paternal grandparents were Jean De Bethencourt I and Nicole De Grainville; his maternal grandparents were Jean De Saint Martin and Isabeau De Harcourt.  He was an only child.

They had a son named Regnault De.