Joan was born about 1168 in Pembroke, Pembrokeshire, Wales, the daughter of Adam de Port and Mabel d’Orval.
She died in 1213 in England.
Joan de Port (c1168-1213)
Adam de Port (1151-1213)
John de Port (c1117-<1168)
Maud de St. John (c1127-c1158)
Mabel d’Orval (1153-c1173)