The 23 surnames begin with CO

COBLENTZER (4)
COLETTE (1)
COLIN (1)
COLOMBEL (1)
COMA (1)
COMPAS (5)
CONAN (5)
COQUERIAUX (4)
CORFMAT (4)
CORIGNET (3)
CORLOBÉ (2)
CORNELLY (de) (1)
CORNO (43)
COSSE (1)
COTTY (1)
COUDERC (1)
COUDON (2)
COUGAN (1)
COUGOULIC (5)
COURTIEU (1)
COUSIN (3)
COUTRIS (1)