| Person's Name | Language | Explanation |
| Iantha | English | Variant of IANTHE |
| Ianthe | Greek Mythology | Means "violet flower", derived from Greek ion "violet" and anthos "flower". This was the name of an ocean nymph in Greek mythology. |
| Ianthina | Greek Mythology | Elaborated form of IANTHE |
| Ibolya | Hungarian | Means "violet" in Hungarian. |
| Iolanthe | English | Means "violet flower", derived from Greek iole "violet" combined with anthos "flower". |
| Iole | Greek Mythology | Means "violet" in Greek. In Greek mythology she was a woman beloved by Hercules. |
| Iris | Greek Mythology, English | Means "rainbow" in Greek. Iris was the name of the Greek goddess of the rainbow. This name can also be given in reference to the English word (which derives from the same Greek source) for the name of the iris flower or the coloured part of the eye. |
| Irit | Jewish | Means "daffodil" in Hebrew. |
| Ivy | English | Means simply "ivy" from the name of the climbing plant that has small yellow flowers. |
| Izdihar | Arabic | Means "blossoming" in Arabic. |
J
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| Person's Name | Language | Explanation |
| Jacenty | Polish | Polish form of HYACINTH. Saint Jacenty was a 13th-century Dominican monk from Krakow who was said to have taken missionary journeys throughout northern Europe and Asia. |
| Jacinta | Spanish, Portuguese | Spanish and Portuguese feminine form of HYACINTH |
| Jacinthe | French | French feminine form of HYACINTH |
| Jacinto | Spanish, Portuguese | Spanish and Portuguese form of HYACINTH |
| Jasmin | English (Modern) | Variant of JASMINE |
| Jasmine | English | From Persian Yasmin, the name of a climbing plant with fragrant flowers which is used for making perfumes. |
| Jasmyn | English (Modern) | Variant of JASMINE |
| Jazmin | English | Variant of JASMINE |
| Jazmine | English | Variant of JASMINE |
| Jessamine | English | Variant of JASMINE influenced by the spelling of JESSICA |
| Jessenia | Arabic | Meaning unknown. Possibly from the name of the species of palm tree; possibly means "flower" in Arabic. |
| Jonquil | English | From the English word for the type of flower, derived ultimately from Latin juncus "reed". |
| Ju | Chinese | Means "chrysanthemum" in Chinese. |
| Sources: Compilation from Behind the Name website. |
