John Clanvowe
From LGBT Archive
Sir John Clanvowe (1341–1391) was an English poet and knight, and friend of Geofffrey Chaucer. He and Sir Richard Neville were buried in the same tomb in Constantinople. The arrangement of their two coats of arms on the tomb is the same as would be used for a married couple.
A contemporary chronicle says that Clanvowe's death caused Neville, "for whom his love was no less than for himself, such inconsolable sorrow that he never took food again and two days afterward breathed his last".
References
The story of Clanvowe and Neville is related by Alan Bray in The Friend, Chapter 1, "Wedded Brother".