Baron Sir Guy of Haverford Bryan
Guy of Haverford was born about 1254.  He died after 1271.

 Sybil Sully
Sybil was born about 1254 in Walwyn Castle, Pemb, Wales.

 Baron Guyon of Walwyn Bryan
Guyon of Walwyn was born about 1289 in Walwyn, Pemb, Wales.  He died in 1349.