Remarks:
Joan (Joanna) Plantaganet of Acre, born in 1272, in Acre in the Holy Land during a crusade, died in April 1307. She was looked after in Ponthieu, by her maternal grandmother, Jeanne of Dammartin, much of her childhood. She married in 1290, (1) Gilbert de Clare, Earl of Gloucester, who died in 1295, and later, a clandestine marriage, to (2) Ralph de Monthermer, who died in 1307.
("The Genealogy of Homer Beers James", V1, JANDA Consultants, c 1993 Homer James)