- Cabaniss
- Caccamo
- Caceres
- Cadwell
- Cage
- Cagle
- Cahall
- Cahill
- Cain
- Cain-Murphy
- Calandra
- Calderone
- Caldwell
- Calhoun
- Call
- Callahan
- Callery
- Calliari
- Callihan
- Calton
- Calvello
- Camden
- Cameli
- Camilliere
- Camp
- Campbell
- Camplejohn
- Canady
- Canelas
- Canfield
- Caniano
- Cannady
- Cannon
- Cantor
- Cantwell
- Canty
- Cao
- Capel
- Caporal
- Capps
- Caprell
- Cara
- Carcopo
- Card
- Cardella
- Cardello
- Cardez
- Cardinell
- Cardon
- Carey
- Cargile
- Carie
- Caristo
- Carleno
- Carlile
- Carlisle
- Carlson
- Carlton
- Carlucci
- Carmack
- Carmichael
- Carmon
- Carney
- Carothers
- Carpenter
- Carr
- Carraway
- Carrico
- Carrier
- Carrigan
- Carroll
- Carroo
- Carson
- Carswell
- Carter
- Cartier
- Cartwright
- Carver
- Case
- Casey
- Cash
- Caso
- Cason
- Cassel
- Cassell
- Cassidy
- Casteen
- Castelloe
- Castelo
- Castleberry
- Castro
- Cate
- Catherman
- Cato
- Catoe
- Causby
- Causey
- Cavanagh
- Cavaroc
- Cavey
- Caviness
- Cebina
- Cecchettini
- Cecil
- Celestino
- Ceyrolles
- Chachkes
- Chaimowicz
- Chakraborty
- Challener
- Chalmers
- Chamberlain
- Chamberlim
- Chambers
- Chamblee
- Champ
- Champion
- Champitto
- Chan
- Chance
- Chander
- Chandler
- Chang
- Chapin
- Chaplinsky
- Chapman
- Chappell
- Charest
- Charles
- Charlesworth
- Charlton
- Charns
- Charny
- Charron
- Chase
- Chastain
- Chasten
- Chatterjee
- Chau
- Chavasse
- Chavis
- Cheek
- Chell
- Chen
- Chenery
- Cheney
- Cheng
- Chernoff
- Cherny
- Cherry
- Cherveny
- Cheshire
- Chesley
- Chesney
- Chesson
- Chestnutt
- Cheves
- Chew
- Chewning
- Chibbra
- Chick
- Chiesa
- Chiles
- Chilton
- Chin
- Chirico
- Chisholm
- Chism
- Chizmar
- Chmielecki
- Cho
- Choate
- Chong
- Chopra
- Choquette
- Chriscoe
- Chrisman
- Christensen
- Christian
- Christianson
- Christmas
- Christofaro
- Chrzan
- Chudy
- Chung
- Church
- Churchill
- Churn
- Cialone
- Cichetti
- Cicuto
- Cifers
- Cil
- Cilley
- Cimerro
- Cipriani
- Cistola
- Civitate
- Clancy
- Clapp
- Clare
- Clark
- Clarke
- Clary
- Clawson
- Clayton
- Cleary
- Clegg
- Clement
- Clements
- Clemmons
- Clemons
- Cleveland
- Clevenger
- Clifton
- Cline
- Clinton
- Clive
- Cloonan
- Close
- Closs
- Closson
- Cloud
- Clover
- Clowers
- Coates
- Coats
- Cobb
- Coble
- Cobo
- Cochran
- Cockburn
- Cody
- Coe
- Coffey
- Coffman
- Coggins
- Cohen
- Coidan
- Colasurdo
- Colbert
- Colby
- Colcord
- Cole
- Coleman
- Coley
- Colford
- Collar
- Collawn
- Colley
- Collie
- Collier
- Collins
- Colman
- Colonna
- Colosa
- Colston
- Coltrain
- Colucci
- Colwell
- Coman
- Comas
- Combs
- Comer
- Comfort
- Compos
- Condreay
- Condrey
- Coniber
- Conklin
- Conley
- Conn
- Connell
- Conner
- Connolly
- Connor
- Connors
- Conroy
- Conway
- Cook
- Cooke
- Coolbaugh
- Cooney
- Cooper
- Cope
- Copeland
- Copello
- Copensky-Tucker
- Coppedge
- Coppola
- Corbett
- Corbin
- Corbitt
- Corcoran
- Cordes
- Cordle
- Cordoba
- Core
- Corey
- Corkey
- Corlett
- Corley
- Cormany
- Cormier
- Cornell
- Corner
- Cornpropst
- Cornwall
- Correale
- Corso
- Cortazzo
- Cory
- Corzine
- Costello
- Costen
- Costin
- Costner
- Coston
- Cotanch
- Cothran
- Cotroukis
- Cottengim
- Cotter
- Cottle
- Cotton
- Cottone
- Cottrell
- Cotuna
- Coulbourn
- Council
- Coupland
- Courville
- Cousino
- Cousins
- Couture
- Covington
- Cowan
- Cowherd
- Cowing
- Cowlbeck
- Cox
- Coy
- Cozart
- Crabtree
- Craddock
- Craig
- Craigross
- Crain
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- Crane
- Cranford
- Crase
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- Craven
- Crawford
- Creagh
- Crean
- Creech
- Creegan
- Creekman
- Creekmore
- Creel
- Creese
- Creighton
- Crenshaw
- Cresimore
- Cretella
- Crews
- Criner
- Criscione
- Crisp
- Crissman
- Critcher
- Crittenden
- Crittenton
- Crockett
- Crompton
- Crone
- Cronin
- Crook
- Crooke
- Cros
- Cross
- Crossland
- Crosson
- Croteau
- Crouse
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- Crowe
- Crowell
- Crowley
- Cruess
- Cruikshank
- Crumlich
- Crump
- Crumpler
- Cruse
- Crutchfield
- Cruz
- Cubbison
- Cudak
- Cuddy
- Cuffney
- Culbertson
- Culbreth
- Cullinan
- Culpepper
- Cumming
- Cummings
- Cuningham
- Cunningham
- Curatolo
- Curka
- Curley
- Curmon
- Curran
- Currie
- Currin
- Curry
- Curtis
- Cuthill
- Cuthrell
- Cutts
- Cyrus
- Cyzewski
- Czika
- Czuhai