- Clark (continued)
- Clark-Kennedy
- Clarke
- Clarkson
- Clarvis
- Clattenburg
- Clatworthy
- Clause
- Clausen
- Clavett
- Harriot (between 1813 and 1814 - circa 1850)
- Claxton
- Clay
- Claydon
- Clayson
- Clayton
- Cleal
- Clear
- Cleare
- Cleary
- Cleave
- Clegg
- Cleife
- Clement-Jones
- Clementi
- Clements
- Cleminson
- Clemmence
- Cleveland
- Clevett