| Country | Day | Month | Names |
 Czechia | 20 | January | Ilona |
 Lithuania | 27 | January | Ilona, Jogundas, Jogunde, Natalis, Vytenis |
 Poland | 27 | January | Angelika, Ilona, Jan Chryzostom, Julian, Przybysław |
| Lithuania | 5 | February | Agota, Birute, Gaudvinas, Ilona |
 Spain | 12 | February | Modesto, Eulalia de Barcelona |
 Latvia | 18 | March | Adelina, Ilona, Razna, Sartite |
| Lithuania | 2 | April | Elona, Jostautas, Jostaute, Pranas, Pranciskus |
 Bulgaria | 21 | May | Elena, Konstantin, Kosta, Kostadin, Kostadinka, Lenko, Dicho, Lenko, Dinko, Elenko, Eli, Elin, Elka, Ilona, Kojcho, Kostadina, Kostadinko, Kuncho, Stamen, Stanimir, Stanimira, Stanka, Stoil, Stoyan, Stoian, Stoyanka, Trayko, Dinko |
 Estonia | 18 | August | Heleene, Helene, Helena, Elina, Ilona, Helen, Hell, Hella, Helle, Hellen, Helli |
 Hungary | 18 | August | Ilona |
| Lithuania | 18 | August | Gendvile, Ilona, Mantautas, Sailenis, Saulene |
| Poland | 18 | August | Agapit, Bogusława, Bronisław, Bronisz, Helena, Ilona, Klara, Tworzysława |
 Finland | 9 | October | Ilona |
USA