Billie Castle is mentioned in a traditional Berwickshire song:
Bunkle, Billie and Blanerne
Three castles strong as airn
Built when Davy was a bairn;
They’ll a’ gang doon
Wi’ Scotland’s croon,
And ilke ane sall be a cairn.
The castles referred to are Bunkle Castle, Billie Castle and Blanerne Castle, and the Davy mentioned is David I, which suggested all the castles were in existence by the late 11th century.
Billie Castle was destroyed by the Earl of Hertford during the Rough Wooing in 1544, and is now a ruin.
Alternative names for Billie Castle
Billy Castle; Bylie