Earl Garnait de Mar
Garnait was born in 1272 in Kildrummy Castle, Kildrummy, Aberdeenshire, Scotland.  He died at the age of 33 in September 1305.

 Christina de Bruce
Christina was born about 1273 in Seton, East Lothian, Scotland.  She died in 1357.

 Earl Donald de Mar
Donald was born in 1302 in Saline, Fifeshire, Scotland.  He died at the age of 30 on August 12th, 1332.