- Caba
- Caballero
- Cabaniss
- Cabazos
- Cabell
- Cabiran
- Cabrera
- Cabriales
- Cabusas
- Caceres
- Cade
- Cadena
- Cadenhead
- Cadwell
- Caeg
- Caesar
- Caffaratti
- Caffey
- Caflisch
- Cage
- Cagen
- Cagle
- Cagney
- Caguioa
- Cahalan
- Cahee
- Cahill
- Cain
- Cains
- Cairola
- Caito
- Cajahuaringa
- Caka
- Calabrese
- Calaway
- Calcaben
- Calderon
- Calderone
- Caldwell
- Caley
- Calhoun
- Calip
- Calkins
- Callaghan
- Callahan
- Callais
- Callam
- Callaway
- Callegari
- Callie
- Callier
- Calliham
- Callihan
- Callis
- Callison
- Callner
- Calloway
- Calvano
- Calvert
- Calvin
- Calzada
- Camacho
- Camara
- Camarata
- Cameron
- Camp
- Campa
- Campagna
- Campanga
- Campbell
- Campion
- Campise
- Campisi
- Campo
- Campos
- Campsen
- Campuzano
- Canac
- Canales
- Canamar
- Canas
- Canava
- Cancellare
- Cancelmo
- Canche
- Cancino
- Candella
- Candidus
- Canfield
- Cangelose
- Canida
- Canik
- Caniz
- Canizales
- Canizares
- Canna
- Cannaday
- Cannata
- Cannella
- Canniff
- Canning
- Cannon
- Cano
- Cansler
- Cant
- Cantalamessa
- Cantarero
- Cantor
- Cantrell
- Cantril
- Cantu
- Canup
- Canuteson
- Canzian
- Cao
- Caolwes
- Capers
- Caperton
- Capetillo
- Caplan
- Capper
- Capps
- Caprio
- Captain
- Capuz
- Caram
- Carasco
- Caraway
- Carbajal
- Carbonari
- Carbone
- Carcamo
- Cardenas
- Carder
- Cardillo
- Cardinal
- Cardona
- Cardono
- Cardoso
- Cardwell
- Carew
- Carey
- Caridas
- Carius
- Carl
- Carley
- Carlile
- Carlin
- Carlon
- Carlson
- Carlton
- Carman
- Carmazzi
- Carmen
- Carmichael
- Carmody
- Carmon
- Carmona
- Carmouche
- Carnahan
- Carnell
- Carnes
- Carney
- Carolan
- Carp
- Carpenter
- Carper
- Carpio
- Carr
- Carrabba
- Carrales
- Carranza
- Carrara
- Carraway
- Carreker
- Carrell
- Carreon
- Carrera
- Carrick
- Carrico
- Carrier
- Carriere
- Carrillo
- Carrington
- Carrisalez
- Carroll
- Carrow
- Carrubba
- Carson
- Carss
- Carstarphen
- Carstens
- Carte
- Carter
- Cartes
- Cartmell
- Cartwright
- Caruana
- Caruso
- Carvajal
- Carvallo
- Carver
- Carvin
- Cary
- Casale
- Casamayor
- Casares
- Casarez
- Casas
- Case
- Cases
- Casey
- Cash
- Cashaw
- Casher
- Cashiola
- Cashman
- Casias
- Caskey
- Casler
- Cason
- Caspar
- Casraneda
- Cassady
- Cassaro
- Cassel
- Cassell
- Cassens
- Cassidy
- Cassity
- Castaneda
- Castanon
- Casteel
- Castellani
- Castelli
- Castex
- Castiglie
- Castilla
- Castille
- Castilleja
- Castillo
- Castilow
- Castle
- Castleberry
- Castner
- Caston
- Castor
- Castrejana
- Castriotta
- Castro
- Caswell
- Catacora
- Catanese
- Catano
- Catchman
- Cate
- Catechis
- Cater
- Cates
- Cathey
- Cathriner
- Catlett
- Catlin
- Cato
- Catoe
- Caton
- Cattanach
- Cattaneo
- Cauble
- Caudle
- Caughman
- Cauley
- Causey
- Cauthen
- Caux
- Cavallaro
- Cavanaugh
- Cavazos
- Cavicchi
- Cavitt
- Cayce
- Cazares
- Cazier
- Ceballos
- Cebrun
- Ceccacci
- Cech
- Cedano
- Cedillo
- Cefaratti
- Cegielski
- Cegueda
- Ceijas
- Celestin
- Celis
- Celusniak
- Cemino
- Cenatiempo
- Centeno
- Cepeda
- Cephus
- Ceraudo
- Cerda
- Cerdan
- Cernoch
- Cernosek
- Cerros
- Cervantes
- Cerwinske
- Cesar
- Cesarini
- Cha
- Chabolla
- Chachere
- Chacon
- Chadd
- Chaddick
- Chadwick
- Chae
- Chaffin
- Chagolla
- Chagoya
- Chahala
- Chahine
- Chai
- Chaiet
- Chaifetz
- Chairez
- Chakravarty
- Chalarca
- Chalhoub
- Chalkley
- Chalmers
- Chaltry
- Chalupa
- Chamberland
- Chamberlin
- Chambers
- Chambless
- Chambliss
- Chamness
- Chamon
- Champ
- Champagne
- Champlin
- Champs
- Chan
- Chance
- Chancey
- Chandler
- Chaney
- Chang
- Chann
- Chanon
- Chao
- Chaoman
- Chaouche
- Chaoul
- Chapa
- Chapline
- Chapman
- Chappell
- Chappelle
- Chargois
- Chariton
- Charles
- Charleston
- Charlton
- Charrin
- Charvis
- Chase
- Chasen
- Chaskin
- Chassman
- Chastang
- Chasteen
- Chatelain
- Chatham
- Chatman
- Chatmon
- Chatoney
- Chatterjee
- Chatterson
- Chau
- Chauvin
- Chavarria
- Chavdra
- Chavero
- Chavers
- Chavez
- Chavis
- Chawla
- Chay
- Cheatham
- Cheddie
- Cheek
- Cheers
- Cheeseman
- Chehayeb
- Chelakis
- Chelette
- Chen
- Chenault
- Chenevert
- Cheney
- Cheng
- Chenier
- Chenoweth
- Chepulis
- Cherches
- Cherian
- Chernosky
- Cherrillo
- Cherry
- Chesebro
- Chesnut
- Chesnutt
- Chess
- Chesser
- Chesshir
- Chester
- Chetlin
- Chetty
- Cheung
- Chevalier
- Chevez
- Chevis
- Chevlaier
- Chew
- Chhen
- Chheun
- Chiang
- Chiasson
- Chiavone
- Chica
- Chicoine
- Chiem
- Chikiamco
- Childers
- Childress
- Childs
- Chiles
- Chilivetis
- Chilson
- Chilton
- Chin
- Chinh
- Chiodo
- Chiou
- Chipko
- Chiquelin
- Chirinos
- Chism
- Chisolm
- Chiu
- Chivers
- Chmelik
- Chmielewski
- Choate
- Choe
- Chohrach
- Choi
- Chomel
- Chometa
- Chong
- Chonmaitree
- Choppin
- Choudhury
- Chov
- Chovanec
- Chow
- Chowdhry
- Chowdhury
- Choyce
- Chrien
- Chrismer
- Christ
- Christensen
- Christian
- Christiansen
- Christie
- Christman
- Christopher
- Christy
- Chu
- Chuang
- Chubick
- Chumchal
- Chumley
- Chun
- Chung
- Church
- Churchill
- Churchman
- Churchwell
- Chuter
- Ciarella
- Ciaverelli
- Ciceri
- Cicuzza
- Cifuentes
- Cigler
- Ciminelli
- Cin
- Cintron
- Cionsky
- Cirillo
- Cisernos
- Cisneros
- Citizen
- Citti
- Civallero
- Cizek
- Cizik
- Cizmar
- Claborn
- Claburn
- Clamen
- Clancy
- Clanton
- Clapper
- Clara
- Clark
- Clarke
- Class
- Claudio
- Clause
- Clausen
- Clauson
- Clawater
- Clay
- Claybon
- Claycomb
- Claypool
- Clayton
- Cleary
- Clede
- Clegg
- Clelland
- Clem
- Clemence
- Clemensen
- Clement
- Clements
- Clemer
- Clemmensen
- Clemmons
- Clemons
- Cleveland
- Clewis
- Clexton
- Click
- Cliett
- Clifford
- Clifton
- Clinard
- Cline
- Clingan
- Clinger
- Clingman
- Clink
- Clinton
- Clisham
- Cloessner
- Clomburg
- Clopton
- Clote
- Cloud
- Cloudt
- Clough
- Clouser
- Cloutier
- Cloyd
- Clune
- Clutterbuck
- Cmajdalka
- Coad
- Coale
- Coan
- Coates
- Coatney
- Coats
- Cobaugh
- Cobb
- Cobbin
- Cobbs
- Cobena
- Cober
- Coble
- Coblenz
- Cochran
- Cochrane
- Cochrum
- Cockrell
- Cockroft
- Codding
- Codner
- Cody
- Coe
- Coen
- Coerver
- Cofer
- Coffey
- Coffman
- Cogburn
- Cohan
- Cohen
- Cohn
- Cohnen
- Coil
- Coker
- Cokinos
- Cokins
- Colaco
- Colbert
- Colburn
- Coldiron
- Coldwell
- Cole
- Coleman
- Colemon
- Coles
- Coley
- Colias
- Colin
- Collazos
- Collette
- Colley
- Collie
- Collier
- Collines
- Collingwood
- Collins
- Collinsworth
- Collis
- Collmer
- Collopy
- Collum
- Colman
- Colmbino
- Colomb
- Colombo
- Colon
- Colorado
- Colquhoun
- Colquitt
- Colson
- Colston
- Colthart
- Colucci
- Columbus
- Colunga
- Colville
- Colvin
- Colwell
- Colyandro
- Colyer
- Combs
- Comeaux
- Comer
- Cominsky
- Comiskey
- Comits
- Commiato
- Compean
- Compton
- Comstive
- Comstock
- Comtton
- Conant
- Conbarruvias
- Concialdi
- Concklin
- Condara
- Condit
- Condon
- Cone
- Conery
- Cones
- Coney
- Conger
- Conigliaro
- Conklin
- Conkright
- Conlan
- Conley
- Conlin
- Conn
- Connally
- Conneighton
- Connell
- Connelly
- Connely
- Conner
- Connolly
- Connoly
- Connor
- Conopio
- Conover
- Conrad
- Considine
- Constant
- Constantatos
- Constantino
- Conte
- Contello
- Contestabile
- Conti
- Contreras
- Conway
- Conwell
- Coody
- Cook
- Cooke
- Cooks
- Cooksey
- Cool
- Cooley
- Coolidge
- Coon
- Cooney
- Coonfield
- Coons
- Cooper
- Coots
- Cope
- Copeland
- Copland
- Coplen
- Copsey
- Corb
- Corbett
- Corbin
- Corcoran
- Cord
- Cordell
- Corder
- Cordero
- Cordes
- Cordill
- Cordoba
- Cordova
- Cordray
- Core
- Coretti
- Coria
- Cork
- Corley
- Cormier
- Corneau
- Cornejo
- Cornelius
- Cornelsen
- Cornett
- Cornibert
- Cornicelli
- Cornish
- Cornwall
- Cornwell
- Corolla
- Corona
- Coronado
- Corpus
- Corral
- Corrales
- Correa
- Corredera
- Correll
- Corrigan
- Cort
- Cortes
- Cortez
- Cortina
- Cortinas
- Cortinaz
- Cory
- Coryell
- Cosby
- Coscio
- Coselli
- Cosgrove
- Coskey
- Coss
- Cossio
- Costa
- Costantini
- Costello
- Costillo
- Costonick
- Cote
- Cothran
- Cotino
- Cotner
- Coto
- Cotrone
- Cotten
- Cotter
- Cottingham
- Cotton
- Cottrell
- Couch
- Coulberson
- Coulson
- Coulthard
- Council
- Counsell
- Countryman
- Counts
- Courtney
- Cousey
- Cousin
- Covarrubias
- Covert
- Covey
- Covington
- Cowan
- Cowans
- Coward
- Cowden
- Cowell
- Cowen
- Cowles
- Cowley
- Cowper
- Cox
- Coyle
- Coyne
- Cozad
- Cozart
- Cozens
- Crabb
- Crabtree
- Craddock
- Cradic
- Craft
- Crafton
- Crager
- Cragg
- Craggs
- Craig
- Crain
- Cramer
- Cramerus
- Cramp
- Crane
- Cranford
- Cravens
- Cravey
- Crawford
- Creager
- Creamer
- Creasman
- Credeur
- Creed
- Creedon
- Creek
- Creekmore
- Creeks
- Creel
- Crego
- Cremona
- Crenshaw
- Crenwelge
- Creps
- Cress
- Cressman
- Cresswell
- Cretsinger
- Criner
- Crippen
- Crislip
- Crisp
- Criss
- Crissman
- Crist
- Cristiano
- Criswell
- Critteden
- Crittenden
- Crittendon
- Critz
- Critzos
- Crochet
- Crockard
- Crocker
- Crockett
- Crocombe
- Crofoot
- Croft
- Crogers
- Croiser
- Croix
- Cromer
- Crone
- Cronin
- Cronk
- Crook
- Crooks
- Croom
- Crosby
- Cross
- Crossan
- Crossland
- Crossley
- Crosswell
- Croteau
- Crothers
- Crouch
- Crow
- Crowder
- Crowe
- Crowell
- Crowley
- Crown
- Crownover
- Crowson
- Croxson
- Croyle
- Crucian
- Cruikshank
- Crull
- Crum
- Crumley
- Crump
- Crumpler
- Crumpton
- Crunk
- Cruse
- Crusinberry
- Crutchfield
- Crutchley
- Cruthirds
- Cruz
- Cryer
- Crystal
- Csustaita
- Cubley
- Cubria
- Cuccia
- Cuellar
- Cueto
- Cuiskelly
- Culberson
- Culbert
- Culbertson
- Culbreth
- Culifer
- Cull
- Cullen
- Cullever
- Cullison
- Cullum
- Culotta
- Culp
- Culpepper
- Culton
- Culver
- Cumby
- Cumiford
- Cummings
- Cummins
- Cundiff
- Cunningham
- Cunnius
- Cupic
- Cupitt
- Curbow
- Curby
- Curcio
- Curington
- Curl
- Curley
- Curlin
- Curran
- Currea
- Currey
- Currie
- Curry
- Curtice
- Curtin
- Curtis
- Curtiss
- Curvey
- Cusey
- Cushing
- Cushingberry
- Cushman
- Cutaia
- Cutbirth
- Cuthbert
- Cutherell
- Cutler
- Cutrer
- Cutwright
- Cuzzi
- Cweren
- Cybulski
- Cyrj
- Czyzewski