| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 1681 | Suileabhan | Irish | Black eyed. | M | |
| 1682 | SulliMn | Irish | Black eyed. | M | |
| 1683 | Sullivan | Irish | Dark eyes. Surname. | M | |
| 1684 | Sun | Irish | From the town by the river Boyn. | M | |
| 1685 | Sweeney | Irish | Little hero. | M | |
| 1686 | Sybil | Irish | Prophetess. | F | |
| 1687 | Taber | Irish | Well. | M | |
| 1688 | Tadhg | Irish | Bard. | M | |
| 1689 | Tadleigh | Irish | Bard. | M | |
| 1690 | Tag | Irish | Handsome. Variant of Teague. | M | |
| 1691 | Taicligh | Irish | Peaceful. | M | |
| 1692 | Tait | Irish | Measure of land. Surname. | M | |
| 1693 | Tally | Irish | Surname. | M | |
| 1694 | Tara | Irish | Where the kings met. Also Tara's Halls, where ancient Bards sang deeds of Irish heroes. The ruins of the Halls are on the hill of Tara, meaning crag or tower. | F | |
| 1695 | Tate | Irish | Measure of land. | F | |
| 1696 | Tate | Irish | Measure of land. Surname. | M | |
| 1697 | Taveon | Irish | Variant of the word 'teeve' meaning hillside. | M | |
| 1698 | Tavin | Irish | Variant of the word 'teeve' meaning hillside. | M | |
| 1699 | Tavio | Irish | Variant of the word 'teeve' meaning hillside. | M | |
| 1700 | Tavion | Irish | Variant of the word 'teeve' meaning hillside. | M | |