| Cullen | Irish | Transferred use of the surname, whi.. |  |  |
| Curran | Irish | Popular name derived from the Old I.. |  | |
| Cyril | Irish | Derived from the Late Latin Cyrillu.. | | |
| Dahy | Irish | Anglicized form of Daithi (nimblene.. | | |
| Daineal | Irish | Irish form of Daniel (God is my jud.. | | |
| Daithi | Irish | Old name meaning "swiftness, speed,.. | | |
| Daivi | Irish | Gaelic form of Davy, which is a pet.. | | |
| Dalbhidh | Irish | Gaelic form of David (beloved). See.. | | |
| Daley | Irish | Meaning "assembly." One famous Dale.. |  | |
| Dallas | Irish | A name that means "wise." |  | |
| Daman | Irish | Irish form of Damien (tame), which .. | | |
| Damhnait | Irish | Old name perhaps derived from damh .. | | |
| Dana | Irish | Feminine form of Daniel (God is m.. | | |
| Daniel | Irish | Derived from the Hebrew darnel (God.. | | |
| Darby | Irish | Anglicized form of Diarmaid (withou.. | | |
| Darci | Irish | Meaning "dark."
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| Darcy | Irish | Transferred use of the French surna.. | | |
| Daron | Irish | Meaning "great," it is a feminine f.. | | |
| Darragh | Irish | Derived from the surnames O'Dara an.. | | |
| Darren | Irish | A name that means "great one." A fa.. | | |
| David | Irish | Derived from the Hebrew daVid (belo.. | | |
| Dawn | Irish | A recent borrowing from the English.. | | |
| Deasun | Irish | Gaelic form of Desmond (South Munst.. | | |
| Deborah | Irish | Derived from the Hebrew devorah (a .. | | |
| Decla | Irish | Feminine form of Declan, the Angl.. | | |
| Declan | Irish | Meaning "man of prayer." Saint Decl.. | | |
| Deirbhile | Irish | Gaelic name meaning "poet's daughte.. | | |
| Deirdre | Irish | A popular name of uncertain origin,.. | | |
| Delaney | Irish | Meaning "descendant of the challeng.. | | |
| Denis | Irish | A borrowing from the French, Denis .. | | |
| Derek | Irish | A borrowing from the English, Derek.. | | |
| Dermot | Irish | Anglicized form of Diarmaid (withou.. | | |
| Derry | Irish | Transferred use of the surname mean.. | | |
| Dervila | Irish | Anglicized form of the Gaelic Deirb.. | | |
| Desmond | Irish | Transferred use of the surname O'De.. | | |
