Una's name day is observed on March 21 in Latvia, April 15 in Austria, and May 4 in Ukraine.
Una is a name with roots in Ireland and Scotland, often derived from names meaning ‘lamb’ or ‘one’. While not common in the US, it enjoys moderate popularity in Ireland, Scotland, and Slavic countries like Latvia and Ukraine. It’s overwhelmingly a feminine name, associated with qualities of grace, purity, and quiet strength. The name’s simple sound and historical connections contribute to its enduring appeal. Una evokes a mood of gentle serenity and understated elegance, suggesting a thoughtful and independent personality.
| Country | Day | Month | Names |
 Lithuania | 24 | January | Arturas, Felicija, Gaivile, Marvydas, Sarunas, Vilgaudas |
| Lithuania | 19 | February | Konradas, Nida, Sarunas, Zuzana |
 Poland | 21 | February | Eleonora, Feliks, Fortunat, Kiejstut, Teodor, Wyszeniega |
| Lithuania | 27 | February | Fortunatas, Gabrielius, Ginvilas, Skirmante |
| Lithuania | 17 | March | Gendvilas, Gertruda, Patrikas, Varuna, Vyte |
 Bulgaria | 25 | March | Blagovest, Blagovesta, Blagoi, Blaga, Blago, Blaguna, Bonka, Boncho, Marian, Mariana, Blazhe, Evangelina, Vangel, Dobri, Dobrina, Dobrinka |
| Bulgaria | 28 | May | Sotir, Spas, Spaska, Spasena, Spasuna |
| Poland | 1 | June | Alfons, Alfonsyna, Bernard, Fortunat, Gracjana, Hortensjusz, Jakub, Konrad, Konrada, Magdalena, Nikodem, Świętopełk, Symeon |
 Norway | 2 | June | Runa, Runar, Rune |
| Lithuania | 8 | June | Eiginte, Merunas, Moderdas |
| Lithuania | 12 | June | Anupras, Dove, Kristijonas, Kristis, Ramunas |
 USA | 23 | June | Audra, Audrey, Dashawn, Deshawn, Elton, Ethel, Josiah, Josias, Shaina, Shania, Shaun, Shauna, Shawn, Shawna, Shayna, Shayne, Shonda |
 Latvia | 26 | June | Ausma, Dzejs, Inguna, Inguns, Ulvis |
 Finland | 15 | July | Rauna, Rauni |
| Lithuania | 30 | August | Adauktas, Auguna, Gaudencija, Kintenis |
| Latvia | 3 | October | Elza, Gudruna, Ilizana |
| Lithuania | 14 | October | Fortunata, Kalikstas, Mindaugas, Rimvyde |
| Poland | 14 | October | Alan, Bernard, Dominik, Dzierżymir, Fortunata, Kalikst, Kaliksta |
| USA | 14 | October | Calista, Dwight, Fortino, Fortuna, Glennis, Glynnis |
| Finland | 16 | October | Sirkka, Sirkku, Luna, Stella |
| Latvia | 29 | October | Elva, Elvijs, Fortuna, Laimonis |
| Latvia | 8 | December | Guna, Gunars, Marieta, Vladimirs |
| Latvia | 10 | December | Cera, Guna, Judite, Sniedze |
| Poland | 15 | December | Celina, Fortunata, Iga, Ignacja, Ignacy, Krystiana, Nina, Walerian, Waleriana, Wolimir, Żegota |
 Spain | 15 | December | Fortunato, Cristina |
Austria 
Ukraine