- Caccamisi
- Cade
- Caffey
- Caffrey
- Cage
- Cahill
- Cain
- Calame
- Calcote
- Calderale
- Caldwell
- Caley
- Calhoun
- Calicott
- Califf
- Callahan
- Callan
- Callens
- Calliham
- Callow
- Cammack
- Camp
- Campbell
- Camper
- Canaday
- Canale
- Canfield
- Cannon
- Cantler
- Cantor
- Cantrell
- Cantwell
- Canup
- Caperton
- Caplena
- Caplinger
- Cara
- Caradonna
- Caraway
- Carayiannis
- Carbage
- Carbins
- Carey
- Carkeet
- Carlock
- Carlson
- Carlton
- Carman
- Carmichael
- Carmikle
- Carney
- Carpenter
- Carr
- Carrigan
- Carrington
- Carroll
- Carruth
- Carruthers
- Carson
- Carter
- Cartwright
- Caruso
- Carver
- Cary
- Cascio
- Casey
- Cash
- Cason
- Cassidy
- Castle
- Castleman
- Castro
- Caswell
- Catalani
- Catchings
- Cathcart
- Catherine
- Cathey
- Catlin
- Cato
- Catron
- Caughron
- Cauley
- Cavender
- Caver
- Cavin
- Caviness
- Cawein
- Cayo
- Cecil
- Cernosek
- Chafin
- Chaliff
- Chalmers
- Chamber
- Chamberlain
- Chambers
- Chambliss
- Champer
- Champion
- Chance
- Chandler
- Chaney
- Channell
- Chapman
- Chappell
- Chase
- Chastain
- Chatham
- Chatman
- Cheek
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- Chen
- Cheney
- Chesher
- Chesney
- Chew
- Chhim
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- Childres
- Childress
- Childs
- Chilson
- Chimenti
- Chiozza
- Chisholm
- Chism
- Chisolm
- Chisom
- Cho
- Choice
- Choudary
- Chrestman
- Christian
- Christopher
- Chumney
- Church
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- Claflin
- Claiborne
- Clapp
- Clariett
- Clark
- Clarke
- Clarkson
- Clay
- Claybrook
- Clayton
- Clear
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- Clement
- Clements
- Clemmson
- Clemons
- Cleveland
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- Coates
- Coats
- Cobb
- Cobin
- Coble
- Coburn
- Cochran
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- Cockrell
- Cody
- Coe
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- Cohen
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- Colbert
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- Cole
- Coleman
- Coles
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- Collinsworth
- Collis
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- Colturi
- Combs
- Comes
- Compton
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- Conaley
- Condit
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- Confer
- Conkel
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- Crossno
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- Crunk
- Crupie
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- Cruthird
- Cruthirds
- Csuros
- Cullens
- Culley
- Cullum
- Culp
- Culpepper
- Culver
- Cummings
- Cunningham
- Cupp
- Currie
- Curry
- Curtis
- Curtright
- Cushinberry
- Cushing