- Cabiness
- Cable
- Caby
- Cacciabando
- Cacciatore
- Cadamey
- Cadieux
- Cadoret
- Cady
- Caffey
- Cage
- Cahan
- Cahill
- Cahn
- Cain
- Caine
- Caito
- Calabotta
- Calcaterra
- Caldwell
- Calhoun
- Calicutt
- Calkins
- Call
- Callaghan
- Callahan
- Callanan
- Callender
- Callihan
- Calvert
- Calvin
- Calzaretta
- Camarata
- Camargo
- Camba
- Cambron
- Cameron
- Camilleri
- Cammarata
- Cammon
- Camp
- Campbell
- Campeau
- Campise
- Campo
- Canada
- Canan
- Canania
- Canatsey
- Candido
- Canepa
- Canfield
- Canham
- Cann
- Cannady
- Cannito
- Cannon
- Canova
- Cantalin
- Canter
- Cantwell
- Canty
- Capan
- Capellupo
- Capizzi
- Capkovic
- Capone
- Cappel
- Cappos
- Capps
- Capra
- Caputa
- Caragher
- Carbin
- Carbone
- Carcagno
- Card
- Cardamon
- Carder
- Cardinali
- Cardwell
- Carey
- Cariolano
- Carl
- Carleton
- Carlile
- Carlin
- Carlisle
- Carlos
- Carlson
- Carlton
- Carlyle
- Carlyon
- Carmack
- Carmell
- Carmen
- Carmi
- Carmichael
- Carmody
- Carnaghan
- Carnaghi
- Carnasiotis
- Carney
- Carnoske
- Carollo
- Caron
- Carosello
- Carpenter
- Carper
- Carpunky
- Carr
- Carrabino
- Carreon
- Carriglio
- Carriker
- Carrington
- Carroll
- Carron
- Carrow
- Carson
- Carter
- Carthan
- Cartier
- Cartwright
- Caruso
- Caruthers
- Carver
- Cary
- Casamento
- Casanova
- Casarella
- Case
- Casey
- Cash
- Cason
- Casper
- Cassani
- Cassell
- Cassidy
- Cassin
- Cassoutt
- Castaldi
- Castanis
- Casteel
- Casten
- Castiglione
- Castle
- Castleberry
- Castro
- Castulik
- Catalano
- Cataldo
- Catanzaro
- Cates
- Cato
- Cauchon
- Caudle
- Cauley
- Caulfield
- Caulley
- Causey
- Cavanaugh
- Cavano
- Cavataio
- Cavatoe
- Cavellero
- Cays
- Cayson
- Cazenave
- Cazzell
- Cecco
- Cehajic
- Ceko
- Cella
- Cenatiempo
- Centerino
- Cepicky
- Cepluch
- Ceresia
- Ceriotti
- Cernicek
- Cerpa
- Certa
- Cerutti
- Chackes
- Chadwick
- Chaffin
- Chakravarthy
- Chakraverty
- Chamberlain
- Chamberlin
- Chambers
- Chambless
- Chambliss
- Chamness
- Champion
- Chan
- Chandler
- Chaney
- Chang
- Chapie
- Chapin
- Chapman
- Chappuis
- Chapuis
- Charity
- Charles
- Charleston
- Charlwood
- Charron
- Chase
- Chastain
- Chastonay
- Chatman
- Chavaux
- Chavez
- Cheatham
- Chedester
- Cheek
- Cheeley
- Chekoudjian
- Chen
- Chenault
- Cheney
- Chenot
- Chernyak
- Cherrick
- Cherry
- Chervek
- Chesler
- Chesnek
- Chesterton
- Chestnut
- Chevalier
- Chew
- Chezrony
- Chi
- Chiasson
- Chibnall
- Chickos
- Chierek
- Chiesa
- Childers
- Childress
- Chiles
- Chill
- Chillers
- Chilton
- Chinnici
- Chiodini
- Chirchirillo
- Chisholm
- Chism
- Chitwood
- Chivell
- Chohlis
- Choi
- Choudhuri
- Chouhan
- Chow
- Chrenka
- Chrisler
- Christ
- Christanell
- Christensen
- Christian
- Christiansen
- Christman
- Christmann
- Christner
- Christopher
- Christy
- Chronister
- Chronopoulos
- Chruma
- Chu
- Chubb
- Chuckray
- Chulick
- Chung
- Ciaccio
- Ciarniello
- Cibulka
- Ciegel
- Cillo
- Cimaglia
- Cimo
- Cinciripini
- Ciolino
- Ciottone
- Cipponeri
- Cira
- Cissell
- Ciszewski
- Ciuffa
- Cizek
- Claes
- Claeys
- Claggett
- Clamp
- Clancy
- Clanton
- Clar
- Clarett
- Clark
- Clarke
- Clase
- Clasen
- Claude
- Claus
- Clausen
- Clausner
- Clauss
- Claussen
- Clavenna
- Clay
- Claybrooks
- Claypool
- Clayton
- Claywell
- Cleary
- Clemens
- Clement
- Clements
- Clemmons
- Clemon
- Clemons
- Cler
- Clerk
- Clerkley
- Clermont
- Cleve
- Cleveland
- Clever
- Clewell
- Cliffe
- Clifford
- Clifton
- Clincy
- Cline
- Clines
- Clingan
- Clinkenbeard
- Clinton
- Clipp
- Clodfelter
- Clohessy
- Cloninger
- Close
- Clouse
- Clover
- Clow
- Clukies
- Clymer
- Coach
- Coad
- Coalson
- Coates
- Coats
- Cobb
- Cobbs
- Coble
- Coburn
- Cochran
- Coco
- Cocos
- Cody
- Coe
- Coen
- Coerver
- Cofer
- Coffin
- Coffman
- Coger
- Coggins
- Cogshell
- Cohen
- Cohn
- Cohnes
- Coin
- Cointin
- Colagiovanni
- Colbert
- Cole
- Coleman
- Coll
- Collett
- Colletti
- Collier
- Collins
- Collister
- Collor
- Colombini
- Colombo
- Colon
- Colona
- Colten
- Colter
- Colvin
- Colyer
- Comado
- Combs
- Comfort
- Commerford
- Compas
- Comporato
- Compton
- Conant
- Conard
- Conaway
- Conboy
- Concannon
- Condie
- Condis
- Condon
- Condra
- Conerly
- Congdon
- Conine
- Conley
- Connaughton
- Connelly
- Conner
- Conners
- Connolly
- Connor
- Connors
- Conover
- Conrad
- Conran
- Conroy
- Consiglio
- Consolino
- Constance
- Constantin
- Constantino
- Constien
- Conte
- Conturo
- Convy
- Conway
- Conway-Long
- Cook
- Cooke
- Cooksey
- Cooley
- Coombs
- Coon
- Cooney
- Cooper
- Cooperman
- Cooseman
- Coovert
- Cope
- Copeland
- Coplen
- Coppay
- Corbett
- Corbin
- Corcoran
- Cordeal
- Cordes
- Corey
- Corich
- Corless
- Corley
- Cormack
- Corman
- Corn
- Corneli
- Cornelius
- Cornell
- Cornfeld
- Cornish
- Corona
- Correnti
- Corrigan
- Corrubia
- Corso
- Cortinas
- Corum
- Corwin
- Corzine
- Cosby
- Coser
- Cosner
- Costa
- Costas
- Costello
- Costo
- Cotton
- Coudle
- Coughenour
- Coughlin
- Coulon
- Coulter
- Counce
- Cournoyer
- Courson
- Courtaway
- Courtney
- Courtois
- Cousins
- Couteranis
- Couture
- Cova
- Covault
- Covert
- Covey
- Covington
- Cowan
- Cowart
- Cowdery
- Cowell
- Cowick
- Cowles
- Cox
- Coyle
- Cozort
- Crabtree
- Cracchiola
- Craddock
- Craden
- Crader
- Cradock
- Craft
- Crafton
- Craig
- Crake
- Crancer
- Crandall
- Crane
- Crask
- Craven
- Crawford
- Crawley
- Creamer
- Crean
- Creech
- Creedon
- Creek
- Creer
- Creighton
- Creitz
- Crespi
- Cresswell
- Crews
- Cribbin
- Cribbs
- Cridland
- Crigler
- Crimmins
- Cripps
- Crisler
- Crist
- Crites
- Crittenden
- Crnalic
- Crnko
- Crocker
- Crockwell
- Croft
- Crofton
- Croghan
- Cromwell
- Croner
- Cronin
- Cronley
- Crook
- Crooks
- Crosby
- Crosier
- Cross
- Crossland
- Crossno
- Crouch
- Crouse
- Crouther
- Crow
- Crowder
- Crowe
- Crowell
- Crowley
- Crownover
- Crull
- Crum
- Crume
- Crump
- Crumpton
- Crusinbery
- Crutchfield
- Crutsinger
- Cuba
- Cucchi
- Cuccia
- Cuci
- Cuddihee
- Cuddy
- Culkin
- Cullen
- Cullman
- Cullmann
- Cullum
- Culp
- Culton
- Cummings
- Cummins
- Cunigan
- Cunnigham
- Cunning
- Cunningham
- Cuongtang
- Cupples
- Cuppy
- Curby
- Curcuru
- Curd
- Cureton
- Curran
- Curry
- Curtin
- Curtis
- Cusanelli
- Cushshon
- Custard
- Cusumano
- Cutak
- Cutelli
- Cuthbert
- Cutler
- Cutrona
- Cuttler
- Cutts
- Cyliax
- Cytron
- Cyvas
- Czarnecki
- Czerwinski