| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 521 | Connal | Irish | High and mighty. | M | |
| 522 | Connell | Irish | Variant of Conall: High and mighty. | M | |
| 523 | Conner | Irish | Hound lover. Variant of Connor: Full of desire; much desire. | M | |
| 524 | Connie | Irish | Strong willed or wise. Also a diminutive of Conlan: Hero. | M | |
| 525 | Connlaio | Irish | Ardent or wise. | M | |
| 526 | Connlaodh | Irish | Pure fire. | M | |
| 527 | Connlaoi | Irish | Variant of Connlaodh: Pure fire. | M | |
| 528 | Connlaoth | Irish | Variant of Connlaodh: Pure fire. | M | |
| 529 | Connlyn | Irish | Variant of Conlan: Hero. | M | |
| 530 | Connolly | Irish | Brave or wise. | M | |
| 531 | Connor | Irish | Strong willed or wise 'Hound-lover.' Also from the Irish 'Coachuhhar', meaning high desire. Famous bearers: In Irish mythology Connor was an early king of Ulster.; 20th century Irish diplomat Conor Cruise O'Brien. | M | |
| 532 | Conny | Irish | Strong willed or wise. Also a diminutive of Conlan: Hero. | M | |
| 533 | Conor | Irish | Strong willed or wise 'Hound-lover.' Also from the Irish 'Coachuhhar', meaning high desire. | M | |
| 534 | Conquhare | Irish | Variant of Conchobhar: Strong dog; strong willed or wise. | M | |
| 535 | Conroy | Irish | Wise or red. | M | |
| 536 | Conway | Irish | Hound of the plain. | M | |
| 537 | Cony | Irish | Variant of Corey 'Hill hollow.'. | M | |
| 538 | Cooey | Irish | Hound of the plains. | M | |
| 539 | Cooley | Irish | Hound of Ulster. | M | |
| 540 | Coolie | Irish | Hound of Ulster. | M | |