- Caban
- Caffey
- Cailor
- Cain
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- Caizza
- Cala
- Calabrese
- Calabria
- Calai
- Calcagni
- Caler
- Calhoun
- Callahan
- Calpin
- Calzo
- Camacci
- Camens
- Camp
- Campana
- Campati
- Campbell
- Campean
- Campman
- Canacci
- Candella
- Cannell
- Cantanzriti
- Cantelmi
- Cantwell
- Caparso
- Capezio
- Cappitte
- Carabbia
- Carabine
- Caraccia
- Caran
- Carano
- Carbon
- Carcella
- Carcelli
- Carchedi
- Card
- Cardelein
- Carden
- Carey
- Carissimi
- Carkido
- Carlomagno
- Carlozzi
- Carlson
- Carmichael
- Carnathan
- Carnes
- Carney
- Caroline
- Carpenter
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- Carroll
- Carron
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- Carson
- Carter
- Cartwright
- Caruso
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- Casanta
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- Case
- Casey
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- Cassese
- Castell
- Castick
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- Catalano
- Catchpole
- Catey
- Cathey
- Catley
- Catlos
- Catullo
- Cauley
- Cavalier
- Cavucci
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- Ceci
- Cecil
- Ceja
- Celidonio
- Centofanti
- Centrello
- Cera
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- Cercone
- Cerimele
- Cernica
- Cerny
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- Cestone
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- Chick
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- Christian
- Christoff
- Christofil
- Christopher
- Chuey
- Chumita
- Chung
- Chunn
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- Churlik
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- Cirelli
- Citarella
- Citizen
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- Clarett
- Clark
- Clarke
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- Claypoole
- Clayton
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- Clegg
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- Clemente
- Clever
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- Clipse
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- Coley
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- Colla
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- Crum
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- Cruz
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- Csernik
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- Curall
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- Curry
- Curtin
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- Cuva
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- Czuba