- Cabe
- Cade
- Cain
- Calderwood
- Caldwell
- Caler
- Calhoun
- Calinsky
- Call
- Callahan
- Callan
- Callier
- Calligheris
- Callister
- Calovich
- Calvert
- Camacho
- Cambon
- Cammann
- Camp
- Campbell
- Campos
- Canfield
- Cannamela
- Cannariato
- Canning
- Cannon
- Cano
- Cantrell
- Capporelli
- Capps
- Capshaw
- Carcione
- Card
- Carden
- Cardinale
- Cardoza
- Cargile
- Carley
- Carlsen
- Carlson
- Carlton
- Carmack
- Carmean
- Carpender
- Carpenter
- Carr
- Carson
- Carter
- Carver
- Cary
- Case
- Casey
- Cash
- Casper
- Cassell
- Castanon
- Casterline
- Castle
- Casto
- Cate
- Cather
- Cathey
- Caverly
- Cavin
- Cavitt
- Cawthon
- Cederburg
- Cegnar
- Cembalisty
- Cenarrusa
- Ceniga
- Centanni
- Cepek
- Chacartegui
- Chadband
- Chadwick
- Chaffee
- Chaine
- Chalfant
- Chalifoux
- Chambers
- Chandler
- Chaney
- Channpraseut
- Chapman
- Chapple
- Charlton
- Chasan
- Chase
- Chastaine
- Chatburn
- Chatterton
- Chauvin
- Chebul
- Chelstrom
- Chen
- Chertudi
- Chi
- Chilcote
- Child
- Chiles
- Chivers
- Choate
- Chojnacky
- Choules
- Chrisman
- Christensen
- Christeson
- Christiansen
- Christianson
- Christison
- Christoph
- Chronic
- Chu
- Chua
- Chugg
- Church
- Cianci
- Cilek
- Cirillo
- Ciulla
- Claar
- Claiborn
- Clark
- Clarke
- Clausen
- Claymore
- Clayton
- Clegg
- Clem
- Clemens
- Clements
- Clemo
- Cleveland
- Cleverly
- Cline
- Clohessy
- Cloonan
- Close
- Clough
- Clovis
- Clubb
- Cluff
- Coate
- Coates
- Cobb
- Cobbs
- Cobler
- Cobley
- Coca
- Cochell
- Cochran
- Cochrane
- Coe
- Coffee
- Coffin
- Cogswell
- Colburn
- Cole
- Coleman
- Colgrove
- Colibas
- Collaer
- Collett
- Collias
- Collier
- Collings
- Collins
- Coltrin
- Colwell
- Combe
- Combes
- Combs
- Compton
- Comstock
- Conant
- Conklin
- Conley
- Connelly
- Conner
- Connors
- Conrad
- Conroy
- Constantinidis
- Contos
- Cook
- Cooksey
- Cool
- Coombs
- Coon
- Coonce
- Coonrod
- Cooper
- Cope
- Copeland
- Copsey
- Corbett
- Corisis
- Corley
- Corn
- Cornelius
- Cornell
- Cornwall
- Corpus
- Corrick
- Corrigan
- Corron
- Corson
- Cory
- Cosho
- Costello
- Cottle
- Couch
- Coulson
- Coulter
- Couper
- Courtright
- Cover
- Cowden
- Cowman
- Cox
- Coy
- Coyle
- Cozine
- Crager
- Craig
- Cram
- Cramer
- Crandall
- Crane
- Cranney
- Crapser
- Crawford
- Crawforth
- Crawley
- Crayne
- Creamer
- Cree
- Crisp
- Crist
- Critchlow
- Critser
- Crockett
- Croft
- Cromwell
- Crooks
- Crosby
- Cross
- Croteau
- Crowe
- Crowell
- Crowther
- Crozier
- Crum
- Crumb
- Cruz
- Crystal
- Csik
- Culbertson
- Cullen
- Cullum
- Culver
- Cummins
- Cumpton
- Cundiff
- Cunningham
- Curren
- Curry
- Curtis
- Curtright
- Custer
- Cutbirth
- Cutler