- Cahill
- Cain
- Calhoun
- Calkin
- Calkins
- Call
- Campbell
- Camplese
- Cannon
- Card
- Carey
- Carlson
- Carmony
- Carpenter
- Carr
- Carter
- Cartwright
- Caruso
- Casey
- Casman
- Cassidy
- Cawlfield
- Cervelli
- Chamberlain
- Chamberlin
- Chambers
- Chapman
- Charles
- Charlton
- Charvat
- Chesley
- Chester
- Chevallier
- Chriske
- Christensen
- Christian
- Christiansen
- Christianson
- Christnacht
- Church
- Ciske
- Claassen
- Clark
- Clausen
- Cleveland
- Cloninger
- Cochran
- Cole
- Coleman
- Collick
- Collins
- Colvin
- Connick
- Cook
- Cooper
- Coplin
- Copps
- Corcoran
- Corder
- Cordingley
- Cornelius
- Cosgrove
- Cotter
- Cottingham
- Cottrill
- Court
- Cox
- Craig
- Crawford
- Crennen
- Crider
- Crifaci
- Crocifisso
- Crocker
- Cronin
- Cross
- Crowley
- Cullen
- Culp
- Currie
- Curtis