See also

Sir BEREFORD's father: William de BEREFORD ( - )
Sir BEREFORD's brother: Osbert de BEREFORD ( - )
Margaret DU PLESSIS's parents: Sir Hugh DU PLESSIS (c. 1237-1292) and Isabel BISSETT (c. 1228-c. 1278)

Family of Sir William de BEREFORD and Margaret DU PLESSIS

Husband:
Sir William de BEREFORD (c. 1260-c. 1326)
Wife:
Margaret DU PLESSIS (c. 1263- )
Children:
Agnes de BEREFORD (c. 1290-1375)
Edmund de BEREFORD ( - )

Husband: Sir William de BEREFORD

Name:
Sir William de BEREFORD
Sex:
Male
Father:
William de BEREFORD ( - )
Father:
-
Birth:
c. 1260¹
Death:
c. 1326 (age 65-66)¹

Wife: Margaret DU PLESSIS

Name:
Margaret DU PLESSIS
Sex:
Female
Father:
Sir Hugh DU PLESSIS (c. 1237-1292)
Mother:
Isabel BISSETT (c. 1228-c. 1278)
Birth:
c. 1263¹

Child 1: Agnes de BEREFORD

Name:
Agnes de BEREFORD
Sex:
Female
Spouse:
John (Sir) D'ARGENTINE (c. 1278-1318)
Birth:
c. 1290
Burton-on-the-Wolds, Leics¹
Death:
18 Jul 1375 (age 84-85)
Newgate, London²

Child 2: Edmund de BEREFORD

Name:
Edmund de BEREFORD¹
Sex:
Male

Sources

1.: geni.com.

2.: familysearch.org.