Thomas Monthermer
Thomas was born in 1301 in England.  He died at the age of 39 in 1340 in England.

 Margaret Teyes
Margaret was born about 1301 in England.  She died in 1349 in England.

 Margaret Monthermer
Margaret was born about 1321 in Devonshire,  England.  She died about 1395 in England.