| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 901 | Calldwr | English | Cold brook. | M | |
| 902 | Calvert | English | Cowherd; cowboy. | M | |
| 903 | Calvex | English | Shepherd. | M | |
| 904 | Calvin | English | Bald. Famous Bearers: Early 20th century American President Coolidge; fashion designer Calvin Klein. | M | |
| 905 | Calvino | English | Variant of Calvin: Bald. Famous Bearers: Early 20th century American President Coolidge; fashion designer Calvin Klein. | M | |
| 906 | Camden | English | Winding valley. | M | |
| 907 | Captain | English | He who is in charge. | M | |
| 908 | Carl | English | Man. Famous Bearer: astronomer Carl Sagan. | M | |
| 909 | Carlatun | English | From Carl's farm. | M | |
| 910 | Carleton | English | Peasants' settlement. Derived from a surname and place name; based on Old English.Free men's town. | M | |
| 911 | Carlisle | English | From the protected tower; from the walled city. Also a place name in Britain. | M | |
| 912 | Carlson | English | Variant of Carlton 'free men's town.'. | M | |
| 913 | Carlton | English | Peasants' settlement. Derived from a surname and place name; based on Old English.Free men's town. | M | |
| 914 | Carlyle | English | Variant of Carlisle: From the protected tower; from the walled city. | M | |
| 915 | Carmel | English | Variant of Carmine: Garden. | M | |
| 916 | Carmelo | English | Variant of Carmine: Garden. | M | |
| 917 | Carmine | English | Garden. | M | |
| 918 | Carnell | English | Defender of the castle. | M | |
| 919 | Carol | English | Manly, strong. A variant of Charles; from Carolus, the Latinized form of the name. Famous bearer: Pope John Paul II's real name is Karol Wojtyla. Karol is a variant spelling of Carol used in several European countries. | M | |
| 920 | Caroll | English | Variant of Carroll: Man. Famous Bearer: late television actor Carroll O'Connor. | M | |