| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| ISAIAS | - | Biblical | ||
| ISAIJA | - | Serbian, Macedonian | ||
| ISAK | EE-sahk | Swedish, Norwegian, Danish | ||
| ISAMU | ee-sah-moo | Japanese | ||
| ISAURA | ee-SOW-rah (Spanish) | Portuguese, Spanish, Late Roman | ||
| ISAURE | - | French | ||
| ISAURUS | - | Late Roman | ||
| ISAY | - | Russian | ||
| ISBEL | IZ-bel | English (Rare) | ||
| ISBRAND | - | Ancient Germanic | ||
| ISCAH | - | Biblical | ||
| ISEABAIL | - | Scottish | ||
| ISEBELLA | iz-ə-BEL-ə | English (Rare) | ||
| ISER | - | Yiddish | ||
| ISET | - | Egyptian Mythology |