| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 141 | Aldus | English | From the old house. | M | |
| 142 | Aldwin | English | From the Old English Ealdwine meaning old friend. A common name in the Middle Ages.Wise friend. | M | |
| 143 | Aldwine | English | Wise friend. | M | |
| 144 | Aldwyn | English | From the Old English Ealdwine meaning old friend. A common name in the Middle Ages.Wise friend. | M | |
| 145 | Aldys | English | From the old house. | F | |
| 146 | Alec | English | Originally a diminutive of Alexander, now frequently used as an independent name, Alec became very popular in the middle of the 20th century because of British actor Sir Alec Guinness. | M | |
| 147 | Aleda | English | Winged. | F | |
| 148 | Alen | English | Variant of Alan: Fair; handsome. Also both a diminutive of Albert (noble, bright) and an abbreviation of names beginning with Al-. | M | |
| 149 | Aler | English | From the alder tree. | M | |
| 150 | Aleta | English | Winged. | F | |
| 151 | Alex | English | Abbreviation of Alexander defender of mankind. | M | |
| 152 | Alexa | English | Helper, defender. variant of Alexander. | F | |
| 153 | Alexandra | English | Feminine of Alexander. Defender of mankind. | F | |
| 154 | Alexandrea | English | Feminine of Alexander. Defender of mankind. | F | |
| 155 | Alexandria | English | Feminine of Alexander. Defender of mankind. | F | |
| 156 | Alexandrina | English | Feminine form of Greek Alexander meaning defender of man, common in Britain since early 13th century. Queen Victoria's first name was Alexandrina. | F | |
| 157 | Alexi | English | Variant of Alexander. Helper, defender of man. | F | |
| 158 | Alexia | English | Variant of Alexander. Helper, defender of man. | F | |
| 159 | Alexina | English | Variant of Alexander. Helper, defender of man. | F | |
| 160 | Alexine | English | Helper; defender. Variant of Alexander. | F | |