- Cade
- Cahalan
- Calhoon
- Calhoun
- Callaghan
- Campbell
- Canady
- Canterbury
- Carey
- Carley
- Carney
- Carpenter
- Carr
- Carrillo
- Carroll
- Carson
- Carter
- Cascone
- Casey
- Casteel
- Castro
- Caswell
- Caudle
- Cavanaugh
- Cavlovic
- Chacon
- Chambers
- Chapman
- Chastain
- Chatmon
- Chavez
- Chiles
- Chontos
- Christoph
- Chronister
- Circle
- Cisneros
- Clair
- Clark
- Clauder
- Clem
- Clemons
- Clevenger
- Cline
- Clyde
- Coats
- Cobb
- Colbert
- Coleman
- Collier
- Collins
- Conchola
- Congrove
- Connor
- Conroy
- Contreras
- Conway
- Conyers
- Coody
- Cook
- Cooperwood
- Cordero
- Corkill
- Couch
- Cowan
- Cowher
- Cowles
- Cox
- Cozad
- Craddock
- Craft
- Crafton
- Craig
- Cramer
- Crane
- Crawford
- Creek
- Crockett
- Croner
- Cronin
- Cross
- Crouch
- Crowder
- Crowe
- Crum
- Crump
- Crumpton
- Crystal
- Culey
- Cummings
- Cunningham
- Curran
- Curtis
- Cutting
- Czirr