- Caldwell
- Callesen
- Cambell
- Cammermeyer
- Campbell
- Cannon
- Cantzeler
- Cantzler
- Carlos
- Carlsdatter
- Carlsen
- Carstensdatter
- Carstensen
- Caspersdatter
- Caspersen
- Casse
- Cesar
- Challamell
- Christensdatter
- Christensen
- Christensen Piil
- Christenson
- Christian
- Christiansdatter
- Christiansen
- Christoffersdatter
- Christoffersdatter Schou
- Christoffersen
- Clark
- Clarke
- Clasen
- Claudius
- Clausdatter
- Clausen
- Clem
- Clemensdatter
- Clemensen
- Clements
- Colberg
- Coldevin
- Colding
- Collin
- Conradi
- Constantinsdatter
- Cooley
- Cortsen
- Corvin
- Costello
- Cour
- Courländer
- Cox
- Crane
- Craven
- Crossley
- Crozier
- Curdts
- Currie
- Curtis