| # | Name | Origin | Meaning | Gender | Save |
|---|---|---|---|---|---|
| 641 | Caieta | Latin | Nursed Aeneas. | F | |
| 642 | Cairistiona | Latin | Christian. | F | |
| 643 | Caitlin | Latin | Variant of Catherine: Pure, clear. Form of the Latin Katharina, from the Greek Aikaterina. Famous bearers: a number of saints, including St Catherine of Alexandria, a 4th century martyr who suffered torture on a spiked wheel. | F | |
| 644 | Caits | Latin | Variant of Gaius: To rejoice. Famous bearer: Roman dictator Gaius Julius Caesar. | M | |
| 645 | Cajetan | Latin | Rejoiced. | M | |
| 646 | Calais | Latin | Son of the north wind. | M | |
| 647 | Calchas | Latin | A prophet. | M | |
| 648 | Calcia | Latin | Mother of Cycnus. | F | |
| 649 | Caledonia | Latin | From Scotland. | F | |
| 650 | Calendae | Latin | First. | F | |
| 651 | Cales | Latin | From Cales. | F | |
| 652 | Calida | Latin | Fiery. | F | |
| 653 | Caligula | Latin | Name given to Gaius Ceasar when he was a child. | M | |
| 654 | Calix | Latin | Chalice. | M | |
| 655 | Calleo | Latin | Knowing. | M | |
| 656 | Callida | Latin | Fiery. | F | |
| 657 | Callimaehlls | Latin | Name of a poet. | M | |
| 658 | Calliope | Latin | Muse of epic poetry. | F | |
| 659 | Callista | Latin | Chalice. | F | |
| 660 | Callisto | Latin | A nymph. | F | |