| GIUSTINA f Italian |
| GIUSTINO m Italian |
| IESTYN m Welsh |
| IUSTINA f Late Roman |
| IUSTINIANUS m Late Roman |
| IUSTINUS m Late Roman |
| IUSTUS m Late Roman |
| JOOS m Dutch |
| JOOST m Dutch |
| JOŠT m Slovene |
| JUSTE m French |
| JUSTIN m English, French, Slovene |
| JUSTÍNA f Slovak |
| JUSTINA f English, Slovene, Czech, Lithuanian, Late Roman |
| JUSTINAS m Lithuanian |
| JUSTINE f French, English, Dutch, German |
| JUSTINIAN m History |
| JUSTUS m German, Dutch, Late Roman |
| JUSTY m & f English |
| JUSTYN m Polish |
| JUSTÝNA f Czech |
| JUSTYNA f Polish |
| STIEN f Dutch, Limburgish |
| USTINYA f Russian |
| YUSTINA f Russian |