| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 481 | Collene | Irish | Girl. | F | |
| 482 | Collin | Irish | Virile. | M | |
| 483 | Collins | Irish | Holly. | M | |
| 484 | Colm | Irish | Variant of Columba, a Latin name meaning dove. | M | |
| 485 | Colman | Irish | Dove. | M | |
| 486 | Colmcilla | Irish | Dove of the church. | F | |
| 487 | Colmcille | Irish | Dove of the church. | M | |
| 488 | Colquhoun | Irish | Variant of Calhoun: Small forest. | M | |
| 489 | Colum | Irish | Variant of Columba, a Latin name meaning dove. | M | |
| 490 | Columba | Irish | Variant of Colm: Dove. | M | |
| 491 | Columbo | Irish | Dove. | M | |
| 492 | Coman | Irish | Bent. | M | |
| 493 | Comdhan | Irish | Variant of Comhghan: Twin. | M | |
| 494 | Comhghall | Irish | Hostage. | M | |
| 495 | Comhghan | Irish | Twin. | M | |
| 496 | Comyn | Irish | Shrewd. | M | |
| 497 | Comyna | Irish | Shrewd. | F | |
| 498 | Con | Irish | Diminutive of Conlan: Hero. | M | |
| 499 | Conaire | Irish | Wise or red. | M | |
| 500 | Conal | Irish | High and mighty. | M | |