Malcolm Douglas of Mains

From https://deriv.nls.uk/dcn23/9528/95281270.23.pdf:

(399) Malcolm Douglas of Mains, mentioned in Great Seal Register 1580. He took part in the Raid of Ruthven, and was beheaded 1584. He married, in 1562, a daughter of Cunningham of Drumquhassil, and had issue :

{a) Alexander (No. 400).

(b) Robert Douglas of Spott, created VISCOUNT OF BELHAVEN, 24th June 1633, died 14th January 1639. He married, May 1611, Nicolas, daughter of Robert Moray of Abercairny, who died November 1612. By a Miss Whalley he had a natural son : (1) John Douglas, legitimated 1631.