- Cai
- Cain
- Calagui
- Callahan
- Callistro
- Calvelli
- Camacho
- Caminata
- Campbell
- Campodonico
- Canclini
- Canepa
- Canevari
- Cardenas
- Cardona
- Carlos
- Carr
- Carrillo
- Carroll
- Carter
- Cartwright
- Casing
- Casper
- Castro
- Cavero
- Cazale
- Celaya
- Celeste
- Cerri
- Cervantes
- Chaim
- Chambers
- Chan
- Chandarana
- Chase
- Chatham
- Chavez
- Cheam
- Chelli
- Chew
- Chhun
- Chin
- Christianson
- Christion
- Chuor
- Cimino
- Cissna
- Clark
- Claussen
- Clays
- Cluff
- Cobarrubias
- Coelho
- Coker
- Colombini
- Combs
- Connelly
- Conway
- Cook
- Cooke
- Cooney
- Cooper
- Cornett
- Corral
- Corrales
- Correa
- Cortez
- Costa
- Costello
- Cota
- Cottrell
- Courter
- Cowan
- Crawford
- Criner
- Crone
- Cruz