Earl Archibald ("the Grim") Douglas
Archibald, known as "the Grim", was born about 1325.  He died on December 24th, 1400.

 Lady Joan Moray of Drumsagard & Cortachy
Joan was born about 1325.  She died before 1409.

 Joan Douglas
Joan was born in 1361 in Gilsland, Northumberland, England .  She died in Naworth Castle, Bramton, Cumberland, England.