Archibald Douglas
Archibald was born about 1195 in Douglas Castle, Douglas, Lanarkshire, Scotland.  He died in 1240.

 Margaret Crawford
Margaret was born about 1198 in Crawford, Ayrshire, Scotland.

 Andrew Douglas
Andrew was born in 1225 in Douglas Castle, Douglas, Lanarkshire, Scotland.  He died at the age of 34 in 1259 in Hermiston, Midlothian, Scotland.