| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| JĘDrzej | YEND-zhay | Polish | ||
| JÓZef | YUW-zef | Polish | ||
| JÓZefa | yuw-ZEF-ah | Polish | ||
| JÓZefina | - | Polish | ||
| Jacek | YAH-tsek | Polish | ||
| Jacenty | yah-TSEN-ti | Polish (Rare) | ||
| Jadwiga | yahd-VEE-gah | Polish | ||
| Jadzia | YAH-jah | Polish | ||
| Jagienka | yah-GYEN-kah | Polish | ||
| Jagna | YAHG-nah | Polish | ||
| Jagoda | yah-GAW-dah (Polish) | Croatian, Serbian, Macedonian, Polish | ||
| Jagusia | yah-GUW-shah | Polish | ||
| Jakub | YAH-kuwp (Polish) | Polish, Czech, Slovak | ||
| Jan (1) | YAHN (Dutch, Swedish, Norwegian, Polish, German) | Dutch, Swedish, Norwegian, Danish, Czech, Polish, Slovene, German, Catalan | ||
| Janek | YAH-nek (Polish) | Polish, Czech |