Ralph De Monthermer
Ralph was born in 1262 in Acre, Hazafon, Palestine.  He died at the age of 62 in 1324 in Salisbury, Wiltshire, England.

 Joan Plantagenet
Joan was born in 1272 in Acre, Hazafon, Palestine.  She died at the age of 35 on April 23rd, 1307 in Clare, Suffolk, England.

 Mary Monthermer
Mary was born about 1300 in Monthermer, Hearault, France.

 Thomas De Monthermer
Thomas was born in 1301.