Coulsey Family History
Coulsey Surname Meaning
from a Middle English personal name *Colsy. It may represent an Anglo-Scandinavian *Colsige (Old Scandinavian Kol- ‘black swarthy’ + Old English sige ‘victory’) possibly attested in Colsege (1086) unless it is a scribal miscopying of Anglo-Scandinavian Colswegen (for Colswein see Coulson).
Alternatively later examples of Colsy might be genuine reduced forms of Colswein with loss of final -n. perhaps in some cases a variant of Cawsey.
Source: The Concise Oxford Dictionary of Family Names in Britain, 2021
