| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 281 | Attwell | English | Lives by the spring. | M | |
| 282 | Atwater | English | From the waterside. | M | |
| 283 | Atwell | English | Lives by the spring/well. | M | |
| 284 | Atwood | English | Lives in the forest. | M | |
| 285 | Atworth | English | Lives at the farmstead. | M | |
| 286 | Auberon | English | Variant of Aubrey: Rules with elf-wisdom. Introduced into Britain from France by Aubrey de Vere, a friend of William the Conquerer. De Vere's grandson became the Earl of Oxford. | M | |
| 287 | Aubrey | English | Rules with elf-wisdom. Introduced into Britain from France by Aubrey de Vere, a friend of William the Conquerer. De Vere's grandson became the Earl of Oxford. | M | |
| 288 | Aubry | English | Rules with elf-wisdom. | M | |
| 289 | Audel | English | Old friend. | M | |
| 290 | Auden | English | Old friend. | M | |
| 291 | Audie | English | Old friend. | M | |
| 292 | Audley | English | Old friend. | M | |
| 293 | Audric | English | Old and wise ruler. | M | |
| 294 | August | English | Variant of Augustus: Introduced to Britian by the Hanoverians in the early 18th century, became popular until the beginning of the 20th century. | M | |
| 295 | Augustus | English | Introduced to Britian by the Hanoverians in the early 18th century, became popular until the beginning of the 20th century. | M | |
| 296 | Aundre | English | Manly; brave. Modern variant of Andrew. | M | |
| 297 | Aurick | English | Noble valor. | M | |
| 298 | Austen | English | Variant of Austin: Developed in the Middle Ages from the Latin Augustine, meaning magic dignity, or venerable. Most common as a surname. | M | |
| 299 | Austin | English | Developed in the Middle Ages from the Latin Augustine, meaning magic dignity, or venerable. Most common as a surname. | M | |
| 300 | Austyn | English | Variant of Austin: Majestic. | M | |