| Country | Day | Month | Names |
 Bulgaria | 7 | January | Ivan, Ivaylo, Ivanka, Vanio, Vania, Encho, Enio, Zhan, Zhana, Ivayla, Ivelin, Ivelina, Ivet, Ivo, Yoan, Ioan, Ioana, Yonka, Yonko, Yoncho, Yoto, Kaloyan, Kaloian |
 Croatia | 16 | January | Marcel, Oton, Mislav |
 Latvia | 20 | February | Otokars, Otomars, Smuidra, Vitauts |
| Bulgaria | 7 | March | Bozhan, Bozhidar, Bozhidara, Bozhil, Bozhko, Emanuil, Manol, Mancho, Teodor, Teodora, Toto, Todor, Teodor, Todora, Dora, Bogdan, Bogdana |
| Croatia | 23 | March | Oton, Dražen |
| Croatia | 27 | April | Ozana Kotorska, Jakov Zadranin |
 Spain | 6 | May | Domingo, Evodio, Protógenes, Judith |
 Hungary | 16 | May | Mózes, Botond |
 Denmark | 17 | June | Botolphus |
 Norway | 17 | June | Bodil, Botolv |
 USA | 17 | June | Alcine, Botolf, Harvey, Hervey, Lamar, Lemar |
| Croatia | 2 | July | Oton, Višnja, Ostoja |
| Hungary | 26 | October | Dömötör |
| Croatia | 8 | November | Gracija Kotorski, Milotislav, Bogdan |
| Spain | 14 | November | Teodoto, Clemente |
 Poland | 16 | November | Aureliusz, Dionizy, Edmund, Gertruda, Leon, Marek, Maria, Niedamir, Otomar, Paweł, Piotr |
 Lithuania | 18 | November | Ginvydas, Ginvyde, Otonas, Romanas, Salomeja |
Czechia 
Slovakia