- Cabiness
- Cable
- Cabra
- Cabrera
- Cadilla
- Cagle
- Cain
- Call
- Callahan
- Callicutt
- Callins
- Callis
- Calloway
- Calvarese
- Calvert
- Cameron
- Camp
- Campbell
- Camper
- Caneer
- Cannon
- Canterbury
- Cantley
- Cantrell
- Cape
- Capps
- Caprio
- Captain
- Carbaugh
- Carden
- Carder
- Careathers
- Carl
- Carlen
- Carlisle
- Carlson
- Carlton
- Carlyle
- Carmack
- Carmichael
- Carnell
- Caron
- Carpenter
- Carr
- Carrigan
- Carrigy
- Carroll
- Carson
- Carter
- Caruso
- Carver
- Case
- Casey
- Cash
- Cason
- Cassady
- Castelein
- Castleberry
- Caston
- Cataldo
- Cates
- Catlin
- Cato
- Catrett
- Caudle
- Causey
- Cauthen
- Cavender
- Cawley
- Cawthorn
- Caywood
- Cazalas
- Ceci
- Certain
- Chaffin
- Chambers
- Champagne-Hardi
- Champion
- Chan
- Chandiramani
- Chandler
- Chang
- Chapman
- Chappie
- Chapuran
- Charern
- Charles
- Chase
- Chastain
- Chastine
- Chatelain
- Chatfield
- Chatterjee
- Chaviers
- Cheikh
- Chen
- Chenault
- Chenoweth
- Cheplen
- Cherrie
- Cherry
- Childers
- Childress
- Childs
- Chipman
- Chirwa
- Choate
- Christenson
- Christian
- Christiansen
- Christopher
- Chu
- Chunn
- Churchey
- Ciliax
- Clanton
- Clardy
- Clark
- Clarke
- Clay
- Claybourne
- Clayton
- Cleere
- Cleghorn
- Clement
- Clemons
- Cleveland
- Click
- Clifford
- Clift
- Clifton
- Cline
- Clines
- Clinton
- Cloer
- Clonts
- Clopp
- Cloud
- Clouser
- Clowdus
- Clowers
- Clugston
- Clyburn
- Clymer
- Coates
- Coats
- Cobb
- Cobble
- Coburn
- Cochran
- Cocker
- Coffee
- Coffey
- Coffin
- Cofield
- Cogbill
- Cogburn
- Cogswell
- Cohen
- Colbath
- Colburn
- Colclough
- Cole
- Coleman
- Collette
- Collier
- Collins
- Colvert
- Colwick
- Combs
- Comer
- Compton
- Conard
- Conaway
- Conley
- Conn
- Connally
- Connaughton
- Connor
- Conover
- Conquest
- Conte
- Conway
- Conwell
- Cook
- Cooke
- Cooley
- Coon
- Cooney
- Coontz
- Cooper
- Cope
- Copeland
- Corbett
- Corbin
- Cornelison
- Cornelius
- Cornett
- Cornutt
- Cothran
- Cothren
- Cothron
- Cotton
- Countess
- Counts
- Coupland
- Covell
- Covington
- Cowan
- Coward
- Cowart
- Cowing
- Cox
- Crabtree
- Craddock
- Craft
- Cragon
- Craig
- Craighead
- Crain
- Cramer
- Crandall
- Crane
- Craney
- Crank
- Crauswell
- Craven
- Crawford
- Crayton
- Creel
- Crenshaw
- Crews
- Crim
- Crisp
- Criss
- Crittenton
- Crocker
- Crockett
- Croft
- Cronkhite
- Crook
- Crooks
- Crosby
- Cross
- Crouse
- Crow
- Crowder
- Crowe
- Crowell
- Crowson
- Crumbley
- Crumpton
- Crumrine
- Cruse
- Crutcher
- Cruz
- Csar
- Cuff
- Culpepper
- Culver
- Culwell
- Cummings
- Cunningham
- Curley
- Curns
- Curran
- Currie
- Currier
- Curry
- Curtis
- Custer
- Cutten
- Cutts