Archibald Douglas, 3rd Earl of Douglas

Archibald Douglas, called the Grim (c. 1330–1400), was the illegitimate son of Sir James the Black Douglas, Robert the Bruce's lieutenant. In 1342 he was named an heir to the Douglas lands.

In 1362 he married Joanna de Moravia, heiress of Bothwell, whose estates he took. As Lord of Galloway he was the Black Douglases' chief magnate. After his kinsman James, 2nd Earl, fell at Otterburn without legitimate issue, Archibald inherited as 3rd Earl of Douglas. He died at Threave Castle in 1400 and was buried at Bothwell.