Hardouin was born in year 0797.1 Hardouin's father was Angilbert de Ponthieu and his mother was Bertha Carolingian. His paternal grandparents were Nithard Carolingian and <Unknown>; his. He was the oldest of two children. He had a sister named Arsinde. He died, at the age of 29 years, in year 0826.1
Hardouin de Ponthieu 
