- Cababaan
- Cabada
- Cabaj
- Cabak
- Cabral
- Cabrera
- Cadotte
- Cai
- Calcagno
- Caldera
- Calderon
- Caleshu
- Calhoun
- Callahan
- Callan
- Callanan
- Callaway
- Callejas
- Calonje
- Caltagirone
- Calvara
- Camacho
- Camano
- Camarda
- Camp
- Campbell
- Campero
- Campillo
- Campini
- Campos
- Campra
- Canary
- Cancelmo
- Cancilla
- Canedo
- Canepa
- Canevari
- Canida
- Cannon
- Canonizado
- Cantisani
- Canton
- Capili
- Cappai
- Carbary
- Carcamo
- Cardozo
- Carey
- Carion
- Carleton
- Carlick
- Carlin
- Carlson
- Carlstrom
- Carmelo
- Carpenter
- Carpentier
- Carrara
- Carrig
- Carroll
- Carson
- Carter
- Carwin
- Casazza
- Casella
- Casey
- Casman
- Cassa
- Cassidy
- Castagne
- Castellano
- Castellanos
- Castillo
- Castro
- Cavallero
- Cavanaugh
- Cavano
- Cawley
- Cayabyab
- Cedarblade
- Cenit
- Cerutti
- Cervarich
- Cervisi
- Cevallos
- Chabner
- Chadwick
- Chalmers
- Chamberlain
- Chambers
- Champagne
- Chan
- Chance
- Chang
- Chansin
- Chantaranipapon
- Chao
- Chapman
- Chappell
- Char
- Charyn
- Chase
- Chau
- Chaudhari
- Chaudhry
- Cheever
- Chekene
- Chen
- Cheng
- Chenoweth
- Cheong
- Cherbavaz
- Chesebrough
- Cheu
- Cheung
- Chew
- Chia
- Chiang
- Chick
- Chickering
- Chien
- Chiene
- Chin
- Ching
- Chinn
- Chiramberro
- Chiu
- Cho
- Cho-Wing
- Choden
- Choi
- Chong
- Chorney
- Chou
- Chouldjian
- Chovanes
- Chow
- Choy
- Christensen
- Christian
- Christiansen
- Christie
- Chu
- Chuc
- Chun
- Chung
- Chunn
- Churchill
- Ciaramaglia
- Cid
- Cikes
- Ciment
- Cioni
- Cioth
- Cirelli
- Cisneros
- Ciszek
- Ciulla
- Clagett
- Clark
- Clarkson
- Clemens
- Clement
- Clementz
- Clemons
- Clifford
- Clune
- Cmiel
- Coakley
- Cocke
- Cody
- Coen
- Coffey
- Cofield
- Coggeshall
- Cohen
- Cohler
- Cohn
- Cohrs
- Colamarino
- Colas
- Colbert
- Cole
- Coleman
- Colfer
- Colgate
- Collaco
- Collins
- Collinson
- Colosimo
- Combs
- Commins
- Comparini
- Compean
- Conlan
- Connema
- Connolly
- Connor
- Connors
- Consagra
- Constantine
- Constantineau
- Constantinou
- Conte
- Conway
- COO
- Coogan
- Cook
- Cooke
- Cool
- Coolidge
- Cooper
- Coplon
- Corey
- Corippo
- Corkery
- Cornelius
- Cornell
- Corning
- Cornut
- Corradini
- Corral
- Correia
- Corso
- Corville
- Cory
- Cost
- Costagli
- Costello
- Cottrill
- Coulton
- Courtois
- Covert
- Cowan
- Cowhey
- Cox
- Cozart
- Craft
- Craig
- Cramer
- Crane
- Craw
- Crenshaw
- Cresci
- Crespi
- Creyer
- Crisera
- Cristobal
- Crites
- Crockett
- Cronander
- Cronbach
- Crosby
- Cross
- Crossley
- Crouch
- Crouse
- Crowther
- Cruz
- Cullen
- Cullinan
- Cullison
- Culp
- Culver
- Cummings
- Cunnane
- Cunningham
- Curran
- Currier
- Curry
- Curtiss
- Cusolito
- Cutler
- Cwiklinski
- Czuberki
- Czukor