Una’s name day is observed on March 21st in Latvia. Furthermore, the name day is celebrated on April 15th in Austria. Finally, Una is also recognized on May 4th in Ukraine.
The feminine name Una carries origins rooted in both Latin, meaning "one," and ancient Celtic traditions. While generally uncommon in the USA, it has a history of usage appreciated for its short, sophisticated sound and classic vintage feel. The name projects a mood of elegant simplicity and quiet strength. Globally, Una is firmly established as a girl's name, suggesting singularity and unique identity. Its low American ranking gives it a distinctive edge without sacrificing familiarity. This concise name offers a powerful yet understated choice across cultures.
| 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