| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 1521 | Peyton | Irish | Patrician; noble. Form of Patrick. | M | |
| 1522 | Phelan | Irish | Variant of Faolan: Small wolf. | M | |
| 1523 | Phelim | Irish | Variant of Feidhlim: Good forever. | M | |
| 1524 | Phiala | Irish | Saintname. | F | |
| 1525 | Pierce | Irish | Form of Piers from Peter. | M | |
| 1526 | Pierson | Irish | Form of Piers from Peter. | M | |
| 1527 | Quaid | Irish | Irish form of Walter. | M | |
| 1528 | Queran | Irish | Dark. | M | |
| 1529 | Quigley | Irish | Unruly hair. | M | |
| 1530 | Quin | Irish | Intelligent. | M | |
| 1531 | Quinlan | Irish | Graceful. | M | |
| 1532 | Quinn | Irish | Counsel; intelligent. | M | |
| 1533 | Raghnall | Irish | Strong. | M | |
| 1534 | Raicheal | Irish | Name of a saint. | F | |
| 1535 | Raighne | Irish | Mighty. | M | |
| 1536 | Ranait | Irish | Wealthy or charming. | F | |
| 1537 | Ranalt | Irish | Wealthy or charming. | F | |
| 1538 | Rathnait | Irish | Wealthy or charming. | F | |
| 1539 | Redmond | Irish | A Form of Raymond: counselor. Surname. | M | |
| 1540 | Regan | Irish | Little king. | M | |