| Isack | Laughter; One who Laughs |
| Isambard | Divine strength |
| Isfael | A name meaning God is my salvation. |
| Ishom | A name meaning a peaceful, calm soul. |
| Ison | A name meaning a son of the ice. |
| Isral | A name meaning one who fights God. |
| Itermon | Sea of bitterness |
| Ithail | A name meaning dew of God. |
| Iudcant | A name meaning a singer. |
| Iudgual | From the Old English 'iudgual,' meaning 'judgment' or 'decision.' |
| Iudguallaun | Derived from the Old English 'iudgallaun,' meaning 'judgment of the people.' |
| Iudguallon | From the Old English 'iudgallon,' meaning 'judgment of the lord.' |
| Iudguoret | Derived from the Old English 'iudguoret,' meaning 'judgment of the people's lord.' |
| Iudhail | From the Old English 'iudhail,' meaning 'judgment of the people's lord.' |
| Iudhubr | Derived from the Old English 'iudhubr,' meaning 'judgment of the people's ruler.' |
| Iudic | From the Latin 'iudic,' meaning 'to judge.' |
| Iunet | Derived from the Old English 'iunet,' meaning 'youth' or 'young.' |
| Iurthir | From the Old English 'iurthir,' meaning 'youth' or 'young warrior.' |
| Iuthel | Derived from the Old English 'iuthel,' meaning 'youth' or 'young noble.' |
| Iuvenalus | From the Latin 'iuvenalis,' meaning 'youthful' or 'young.' |
| Ivdnert | Derived from the Old English 'ivdnert,' meaning 'young lord' or 'noble youth.' |
| Ivomagus | From the Latin 'ivomagus,' meaning 'young noble' or 'youthful lord.' |
| Andred | Derived from the Old English 'andred,' meaning 'ruler' or 'leader.' |
| Andretti | Italian surname meaning 'from the land of the Andes' |
| Androw | Short form of Andrew, meaning 'strong and manly' |
| Androwe | Variant of Andrew, meaning 'strong and manly' |
| Angeltheow | Old English name meaning 'divine warrior' |
| Angenmaer | Old English name meaning 'noble and famous' |
| Angenwit | Old English name meaning 'noble and wise' |
| Angis | Old English name meaning 'noble and strong' |
| Anguish | Old English word meaning 'pain or suffering' |
| Aniston | A name meaning Agness town. |
| Aniustans | Latin name meaning 'injust or unfair' |
| Ankor | Anchor; Harvest Worker; Eagle Man |
| Annemiek | A name meaning God is grace. |
| Ansan | Son of Ann or Agnes |
| Ansfrid | Protected by the Gods |
| Ansirus | Latin name meaning 'without a lord' |
| Ansli | Meadow; One; Wood; Only; Clearing |
| Ansy | Meadow; Clearing; Only; Wood; One |