| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 561 | Rioghnach | Irish | Royal. | F | |
| 562 | Riona | Irish | Royal. | F | |
| 563 | Rois | Irish | Horse. | F | |
| 564 | Sadbh | Irish | Good. | F | |
| 565 | Sadhbba | Irish | Wise. | F | |
| 566 | Sadhbh | Irish | Wise. | F | |
| 567 | Saraid | Irish | Excellent. | F | |
| 568 | Scota | Irish | Scotland. | F | |
| 569 | Seana | Irish | Present. | F | |
| 570 | Searlait | Irish | Feminine form of Charles: mannish, manly. | F | |
| 571 | Seosaimhin | Irish | Fertile. | F | |
| 572 | Seosaimhthin | Irish | Fertile. | F | |
| 573 | Shani | Irish | Present. Also a feminine form of Sean: Irish variant of John: God is gracious; gift from God. | F | |
| 574 | Shannon | Irish | Old. Surname and river name. | F | |
| 575 | Shauna | Irish | Present. Also a feminine form of Sean: Irish variant of John: God is gracious; gift from God. | F | |
| 576 | Shawn | Irish | Present. | F | |
| 577 | Shawna | Irish | Present. Also a feminine form of Sean: Irish variant of John: God is gracious; gift from God. | F | |
| 578 | Sheelagh | Irish | Variant of Sheila: Irish variant of Celia: a Roman clan name. | F | |
| 579 | Sheelah | Irish | Irish form of Cecilia: blind. | F | |
| 580 | Sheila | Irish | Irish variant of Celia, from Celius, a Roman clan name. Also a form of Cecilia: blind. | F | |