28 January | Austria | Caroline, Karoline, Manfred, Thomas | Croatia | Toma, Tomislav | Czechia | Otýlie | Denmark | Carolus, Karl, Magnus | Estonia | Kaarel, Kaarli, Kaaro, Kalle, Karel, Karl, Karli, Karro | Finland | Kaarle, Kaarlo, Kalle, Mies | France | Manfred, Thomas | Greece | Palladios | Hungary | Karola, Károly | Italy | Tommaso | Latvia | Kārlis, Spodris | Lithuania | Gedautas, Leonidas, Nijolė | Norway | Karl, Karoline | Poland | Agnieszka, Augustyn, Flawian, Ildefons, Julian, Karol, Leonidas, Piotr, Radomir, Roger, Waleriusz | Romania | Efrem, Iacob, Paladie | Slovakia | Alfonz | Spain | Tomás | Sweden | Karl, Karla |
|