Konstantin: Name day
Name day
Konstantin's name day is observed on May 21 in Bulgaria, Estonia, Finland, Hungary, and Sweden. The name day is also celebrated on September 19 in Slovakia.
Konstantin Origin Meaning and Mood
Konstantin is a robust masculine name originating from the Latin Constantinus, universally carrying the meaning "steadfast" or "constant." Its historical lineage is extensive, tracing back to influential figures and maintaining a strong profile across European cultures. In the US, it appears primarily within communities honoring Slavic or Eastern European roots, giving it a distinctive, old-world character. The name projects a serious, dignified mood, suggesting strength and intellectual reliability rather than playfulness. It is universally recognized as a traditional male designation, embodying enduring character.
Name Day List: Konstantin
| Country | Day | Month | Names |
 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 | 21 | May | Konstantin, Kostel, Tiino, Kindel |
 Finland | 21 | May | Konsta, Kosti, Konstantin |
 Hungary | 21 | May | Konstantin |
 Sweden | 21 | May | Conny, Konstantin |
Name Day List - similar names (Konstantin)
Latvia 
Lithuania 
Greece 
Slovakia