- Cabanatuan
- Cabe
- Cable
- Cabot
- Cain
- Cainion
- Calaway
- Calderon
- Caldiero
- Callahan
- Callan
- Callen
- Callesen
- Camacho
- Camara
- Cameron
- Campbell
- Campenni
- Campion
- Campos
- Camps
- Canada
- Canales
- Cannestra
- Cannon
- Canon
- Capelle
- Capitanio
- Capizzi
- Capper
- Cappon
- Cappuccio
- Captain
- Carbajal
- Carberry
- Cardenas
- Cardinal
- Carey
- Carini
- Carlin
- Carlisle
- Carlovsky
- Carlson
- Carlton
- Carney
- Carnitz
- Carpenter
- Carr
- Carrara
- Carravetta
- Carrillo
- Carroll
- Carstedt
- Carter
- Caruthers
- Carver
- Cascio
- Case
- Casey
- Cash
- Cashill
- Cashmore
- Cason
- Casper
- Cassady
- Casser
- Cassillo
- Castaneda
- Caster
- Castor
- Caswell
- Catalane
- Catalano
- Cataldo
- Catrozoli
- Causey
- Cavallo
- Cavanaugh
- Cavender
- Cayton
- Ceasar
- Cebasek
- Cebula
- Ceccarini
- Ceccato
- Ceci
- Cecsarini
- Cefalu
- Cegla
- Celebre
- Celoni
- Ceplina
- Cepress
- Cera
- Ceranowski
- Cerar
- Cerfus
- Cerletty
- Cernohous
- Cervantes
- Cesarec
- Cesarz
- Cetera
- Chairez
- Chambers
- Chambliss
- Champeau
- Chancellor
- Chandler
- Chaney
- Chapel
- Chaplock
- Chapman
- Chappelle
- Chappie
- Charbonneau
- Charek
- Charlier
- Chars
- Chase
- Chattillion
- Chavez
- Checota
- Chelminiak
- Cheri
- Cherne
- Chernov
- Cherny
- Cherrone
- Chevako
- Chhabria
- Chiappa
- Chiesa
- Childs
- Chilson
- Chinn
- Chintamaneni
- Chipman
- Chirafisi
- Chladek
- Chmielewski
- Choice
- Choinski
- Chojnacki
- Cholka
- Chomicki
- Choroszy
- Chossek
- Choudhury
- Chovanec
- Chow
- Chrisman
- Christ
- Christensen
- Christenson
- Christiaansen
- Christiansen
- Christianson
- Christie
- Christoffersen
- Christofferson
- Christon
- Christopher
- Christopherson
- Chrostowski
- Chrzanowski
- Chucka
- Chudy
- Church
- Churches
- Churness
- Chyphes
- Cianciola
- Cianciolo
- Ciardo
- Ciatti
- Cicerelli
- Ciekurzis
- Cielinski
- Cieminski
- Cieplak
- Ciesielski
- Cieslak
- Cieslik
- Ciezki
- Cifuentes
- Cigan
- Cimuchowski
- Cina
- Cincotta
- Cintron
- Ciocarelli
- Ciofani
- Cira
- Cisek
- Cisler
- Claflin
- Clapps
- Clarizio
- Clark
- Clarke
- Clauer
- Clausing
- Clay
- Clayborne
- Claypool
- Clayton
- Cleary
- Clemens
- Clement
- Clementi
- Clements
- Clemons
- Cleve
- Cleveland
- Cline
- Clines
- Clinkenbeard
- Cloninger
- Clore
- Close
- Cloyd
- Cmelak
- Coakley
- Coates
- Coatta
- Cobb
- Cochrane
- Cockerham
- Coco
- Cody
- Coe
- Coeland
- Coffey
- Cofta
- Coggs
- Cogswell
- Cohen
- Colan
- Colbert
- Colbo
- Colburn
- Cole
- Coleman
- Coley
- Colla
- Collette
- Colletti
- Collier
- Collin
- Collings
- Collins
- Collison
- Collova
- Collura
- Collyard
- Colombo
- Colson
- Colton
- Colvin
- Comerford
- Comeriato
- Comiskey
- Cone
- Conforti
- Conklin
- Conley
- Conlon
- Conn
- Connelly
- Conner
- Connerton
- Connolly
- Connors
- Conrad
- Conroy
- Constant
- Constantine
- Conti
- Contino
- Converse
- Conway
- Cook
- Cooks
- Cookson
- Cooley
- Coombs
- Coon
- Cooper
- Copass
- Coplan
- Copps
- Copsey
- Copson
- Coralic
- Corbett
- Cordes
- Cordie
- Cormia
- Cormican
- Corn
- Cornelius
- Cornils
- Corona
- Corrao
- Corrigan
- Corroo
- Corry
- Corso
- Corsten
- Cortes
- Cortese
- Cortez
- Costello
- Costigan
- Cotrell
- Cottello
- Cotter
- Cotton
- Couillard
- Counihan
- Coutant
- Couture
- Covell
- Cox
- Coxon
- Coyne
- Cozatt
- Craig
- Crain
- Cram
- Cramer
- Cranberg
- Crandall
- Crawford
- Crawl
- Crawley
- Creighton
- Crelin
- Cremer
- Crisp
- Criss
- Crittenden
- Crivello
- Croak
- Croatt
- Crocker
- Croke
- Cronan
- Cronin
- Crooker
- Crooks
- Cross
- Crossman
- Crouch
- Crouse
- Crow
- Crowley
- Croysdale
- Crudup
- Crump
- Cruz
- Crymes
- Crysdale
- Cuccio
- Culberson
- Cullen
- Cunningham
- Curich
- Curley
- Curran
- Curren
- Currie
- Curry
- Curtis
- Cury
- Curzan
- Cushman
- Cusick
- Cutler
- Cutting
- Cvetich
- Cyr
- Czaja
- Czajczynski
- Czajkowski
- Czaplewski
- Czappa
- Czarkowski
- Czarnecki
- Czarniak
- Czarnik
- Czarnota
- Czech
- Czecholinski
- Czechorski
- Czechowski
- Czekalski
- Czemierys
- Czerniak
- Czerniejewski
- Czerwinski
- Czeszak
- Czubkowski
- Czysz