| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Jeltje | YEL-tyə (Dutch) | Frisian, Dutch | ||
| Jeltsje | - | Frisian, Dutch | ||
| Joris | YO-ris (Dutch) | Dutch, Frisian | ||
| Jorrit | - | Frisian | ||
| Jurre | - | Frisian | ||
| Jurryt | - | Frisian | ||
| Kai (1) | KIE (German, Swedish, Finnish) | Frisian, German, Swedish, Norwegian, Danish, Finnish, Dutch | ||
| Kay (3) | KIE (Swedish) | Frisian, German, Swedish, Norwegian, Danish | ||
| Klaes | - | Frisian | ||
| Lourens | - | Frisian, Dutch | ||
| Lubbert | - | Frisian | ||
| Lys | - | Frisian | ||
| Maike | MIE-kə (German) | Frisian, German | ||
| Mareike | mah-RIE-kə (German) | Frisian, German | ||
| Maria | mah-REE-ah (Italian, German, Swedish, Norwegian, Danish, Dutch), mə-REE-ə (Catalan, English), MAHR-yah (Polish), MAH-ree-ah (Finnish) | Italian, Portuguese, Catalan, Occitan, German, Swedish, Norwegian, Danish, Faroese, Dutch, Frisian, |