| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 561 | Avrill | English | Variant of Averill: Fighting boar. | M | |
| 562 | Avryl | English | Opening buds of spring; born in April. | F | |
| 563 | Avryll | English | Variant of Averill: Fighting boar. | M | |
| 564 | Axton | English | Swordsman's stone. | M | |
| 565 | Ayers | English | Heir to a fortune. | M | |
| 566 | Aylmar | English | Variant of Elmer: Noble. | M | |
| 567 | Aylmer | English | Infamous. From the Old English Aethelmaer meaning noble and famous. Used as a first name during the Middle Ages, Aylmer later became more popular as a surname. | M | |
| 568 | Aylward | English | Noble guardian/protector. | M | |
| 569 | Aylwin | English | Variant of Alvin: Wise friend. From the Old English Aetheiwine, and also Aefwine, both meaning noble friend. Various forms of Alvin in use after the Norman Conquest became surnames, and also first names. | M | |
| 570 | Aymer | English | Variant of Elmer: Noble. | M | |
| 571 | Ayrwode | English | From the fir forest. | M | |
| 572 | Azura | English | Sky-blue. | F | |
| 573 | Azure | English | Sky-blue. | F | |
| 574 | Azurine | English | Sky-blue. | F | |
| 575 | Bab | English | Diminutive of Barbara: From the Greek barbaros meaning foreign or strange, traveler from a foreign land. In Catholic custom St. Barbara is a protectress against fire and lightning. | F | |
| 576 | Babs | English | Diminutive of Barbara: From the Greek barbaros meaning foreign or strange, traveler from a foreign land. In Catholic custom St. Barbara is a protectress against fire and lightning. | F | |
| 577 | Backstere | English | Baker. | M | |
| 578 | Baden | English | Surname. | M | |
| 579 | Baerhloew | English | Ruler or lives on the bare hill. | M | |
| 580 | Baiardo | English | Variant of Bayard: Brown hair. | M | |