Simon 1st Baron de Montagu , Sir
Simon 1st Baron de was born about 1240 in Shepton Montague, Somerset, England.  He died on September 26th, 1316.

 Aufrica Princess of Isle of Man
Aufrica Princess of Isle of was born about 1243 in Isle of Man, British Crown dependancy.  She died in 1287.

 William III 2nd Baron de Montagu , KB
William III 2nd Baron de was born about 1273 in Cassington, Oxfordshire, England.  He died on October 18th, 1319 in Gascony, France.