Question: When did Humphrey De Bohun, 2Nd Earl Of Hereford's father die?
Answer: 1 June 1220

He was the son of Henry de Bohun, 1st Earl of Hereford, and Maud FitzGeoffrey. Henry de Bohun, 1st Earl of Hereford (1176 – 1 June 1220) was an Anglo-Norman nobleman. He was Earl of Hereford and Hereditary Constable of England from 1199 to 1220