William ("Long Legs") de Douglas
William, known as "Long Legs", was born in 1200 in Hermiston, Midlothian, Scotland.  He died at the age of 76 in 1276.

 Martha de Bruce
Martha was born in 1207.

 William ("le Hardi") de Douglas
William, known as "le Hardi", was born in 1240 in Douglas, Lanarkshire, Scotland.  He died at the age of 58 in 1298 in Tower of London, London, England.