| Country | Day | Month | Names |
| 20 | June | Karola, Karoliine, Karolin, Kaari, Karlotte, Lota |
| Country | Day | Month | Names |
| 25 | November | Katariina, Katrin, Katre, Katri, Kadrin, Kadri, Kadi, Kati, Kaarin, Karin, Triin, Triina, Triinu | |
| 25 | November | Katri, Kaija, Katja, Kaisa, Kati, Kaarina, Kaisu, Katariina, Katriina, Riina |