William De Montifex
William was born in 1305 in Stobhall, Cargill, Perth, Scotland.¹   He died at the age of 61 in 1366 in Auchterarder, Perth, Scotland.¹ 

 Margaret De Clare
Margaret was born in 1286.¹   She died at the age of 47 in 1333.¹ 

 Mary Montifex
Mary was born in 1330 in Stobhall, Cargill, Perth, Scotland.  She died at the age of 94 in 1424 in ,,,Scotland.