| EQUIVALENTS |
| ANCIENT GREEK: Leon, Leontius |
| ARMENIAN: Levon |
| CROATIAN: Leo, Leon |
| CZECH: Leoš |
| DANISH: Leo |
| DUTCH: Leo, Leon |
| ENGLISH: Leo, Leon |
| FINNISH: Leo |
| FRENCH: Léo, Léon, Léonce |
| GEORGIAN: Levan |
| GERMAN: Leo, Leon |
| ITALIAN: Leone, Leonzio |
| LATE ROMAN: Leo |
| LITHUANIAN: Leonas |
| NORWEGIAN: Leo |
| POLISH: Leon, Lew |
| RUSSIAN: Leonti, Leontiy, Leonty, Lev, Lyov |
| SLOVENE: Leon |
| SPANISH: León, Leoncio |
| SWEDISH: Leo |
|
| DIMINUTIVES AND SHORT FORMS |
| ENGLISH: Lionel |
| FRENCH: Lionel |
|
| FEMININE FORMS |
| ENGLISH: Leola, Leona, Leone, Leontyne |
| FRENCH: Léone, Léonne, Léontine |
| GERMAN: Leona |
| ITALIAN: Leontina |
| LATE ROMAN: Leontina |
|
| OTHER FORMS |
| DUTCH: Leonie |
| FRENCH: Léonie |
| GERMAN: Leonie |
| LATE ROMAN: Leonia, Leonius |
|