C
- Cameron Knowles (born 1982), New Zealand footballer
- Admiral of the White Sir Charles Knowles, 1st Baronet (1704–1777) (see Knowles Baronets)
- Admiral of the Red Sir Charles Knowles, 2nd Baronet (1754–1831)
- Christopher Knowles (born 1959), American poet
- Christopher Knowles (comics), American comic book artist and writer
- Clayton Knowles, New York Times correspondent
- Craig Knowles (born 1959), Australian politician
- Cyril Knowles (1944–1991), English footballer
- Chris Brown (born 1989), American singer
Read more about this topic: Knowles (surname)