| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 521 | Gyles | Gaelic | Servant. | M | |
| 522 | Hagan | Gaelic | Young. | M | |
| 523 | Hogan | Gaelic | Young. | M | |
| 524 | Hurlee | Gaelic | Tide. | M | |
| 525 | Hurley | Gaelic | Tide. | M | |
| 526 | Hurly | Gaelic | Tide. | M | |
| 527 | Iain | Gaelic | Gaelic form of John. | M | |
| 528 | Iomar | Gaelic | Archer. | M | |
| 529 | Irving | Gaelic | Handsome. | M | |
| 530 | Iseabal | Gaelic | Devoted to God. | F | |
| 531 | Isobail | Gaelic | Devoted to God. | F | |
| 532 | Ita | Gaelic | Thirsty. | F | |
| 533 | Kade | Gaelic | From the wetlands. | M | |
| 534 | Kael | Gaelic | Slender; fair. Form of Caelan. | M | |
| 535 | Kaelan | Gaelic | Slender; fair. Form of Caelan. | M | |
| 536 | Kaelin | Gaelic | Slender; fair. Form of Caelan. | M | |
| 537 | Kaine | Gaelic | Tribute. | M | |
| 538 | Kalan | Gaelic | Slender; fair. Form of Caelan. | M | |
| 539 | Kalen | Gaelic | Slender; fair. Form of Caelan. | M | |
| 540 | Kalene | Gaelic | Feminine of Kyle. | F | |