John Horne Stevenson KC (1855 – 1939) was a Scottish lawyer, officer of arms and author.
A member of the Faculty of Advocates, he worked in the Court of the Lord Lyon and was appointed a King's Counsel in 1919.
[1] Stevenson was Unicorn Pursuivant between 1902 and 1925 and Marchmont Herald from 1925 until his death in 1939.
[2][3] He was a member of the Royal Company of Archers and a Knight of Grace of the Order of St John.
He authored several books on the subjects of Scottish heraldry, title law and genealogy.