Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
ROAN
As described in historical dictionaries
Patronymica Britannica (1860)
ROAN. A medieval spelling of Rouen, the capital of Normandy. An old poet, speaking of Richard Coeur de Lion, says :
Surname type: Location or geographical feature
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English