Four ships of the Royal Navy have borne the name HMS Postillion, after the Postilion, the driver of a horse-drawn coach or post chaise, mounted on one of the drawing horses:
References
HMS Postillion Wikipedia(Text) CC BY-SA
Four ships of the Royal Navy have borne the name HMS Postillion, after the Postilion, the driver of a horse-drawn coach or post chaise, mounted on one of the drawing horses: