- Croas
- Croc
- Crocci
- Crocco
- Croce
- Crocella
- Crocetti
- Croche
- Crochet
- Croci
- Crocker
- Crockett
- Croes
- Crofford
- Croft
- Crofton
- Crofts
- Croghan
- Crohare
- Crohn
- Croisier
- Croissier
- Croitor
- Croitoru
- Croix
- Croke
- Croker
- Croll
- Crom
- Cromar
- Crombie
- Crompton
- Cron
- Cronan
- Crone
- Cronen
- Cronin
- Cronk
- Cronshaw
- Crook
- Crooke
- Crookes
- Crooks
- Croome
- Cropper
- Croque
- Croques
- Croquet
- Crory
- Cros
- Crosa
- Crosas
- Crosbie
- Crosby
- Croses
- Croset
- Crosetti
- Crosetto
- Crosfield
- Crosi
- Crosio
- Crosland
- Crosnier
- Cross
- Crossa
- Crossan
- Crosse
- Crossen
- Crossfield
- Crossi
- Crossing
- Crossland
- Crossley
- Crossman
- Crosson
- Crosta
- Croteau
- Crothers
- Crotti
- Crottogini
- Crou
- Crouch
- Croucher
- Crous
- Crouseilles
- Crouzet
- Crovella
- Crovetto
- Crow
- Crowder
- Crowe
- Crowhurst
- Crowley
- Crown
- Crowson
- Crowther
- Croxatto
- Croxford
- Crozet
- Crozier