Erna has name days on March 2nd in Norway and Sweden, April 14th in Austria, July 21st in the USA, August 29th in Hungary, September 12th in Latvia, and September 19th in Estonia.
Erna is a name with Germanic origins, historically popular in the early 20th century, particularly in the United States and Scandinavia. It’s a feminine name, derived from elements signifying strength and seriousness, and often used as a diminutive of longer Germanic names. While its usage has declined, it maintains a vintage charm and is still recognized across Europe. The name evokes a mood of quiet strength and understated elegance, suggesting a thoughtful and refined personality. Erna is rarely given to newborns today, but its historical presence and unique character continue to resonate.
| Country | Day | Month | Names |
 Poland | 19 | January | Andrzej, Bernard, Erwin, Erwina, Eufemia, Henryk, Kanut, Mariusz, Marta, Matylda, Mechtylda, Pia, Racimir, Sara |
| Poland | 9 | February | Apolonia, Bernard, Cyryl, Eryk, Eryka, Gorzysław, Mariusz, Nikifor, Rajnold |
| Poland | 11 | February | Adolf, Adolfa, Adolfina, Alf, Bernadetta, Dezydery, Eufrozyna, Łazarz, Lucjan, Maria, Olgierd, Świętomira |
| Poland | 16 | February | Bernard, Dan, Danisz, Danuta, Julianna, Symeon |
 France | 18 | February | Bernadette |
 Hungary | 18 | February | Bernadett |
 Lithuania | 18 | February | Bernadeta, Gendre, Lengvenis, Simeonas |
 Croatia | 12 | March | Bernard, Budislav, Maksimilijan |
| Poland | 12 | March | Bernard, Blizbor, Grzegorz, Józefina, Wasyl |
 USA | 4 | April | Cedric, Cedrica, Plato, Tiernan, Tierney |
 Finland | 11 | April | Verna, Minea, Minka |
 Austria | 16 | April | Bernadette, Magnus |
| Croatia | 16 | April | Josip Benedikt Labre, Bernardica |
| Poland | 16 | April | Benedykt, Bernadetta, Cecyl, Cecylian, Charyzjusz, Erwin, Erwina, Julia, Ksenia, Lambert, Lamberta, Nikita, Nosisław, Patrycy, Urban |
 Spain | 16 | April | Engracia, Bernadeta |
| USA | 27 | April | Laverne, Sam, Samantha, Samara, Sami, Sammy, Samuel, Samuela, Ulises, Ulysses, Vern, Verna, Verne, Vernon, Zita |
| Croatia | 20 | May | Bernardin Sijenski |
| France | 20 | May | Bernardin |
| Hungary | 20 | May | Bernát, Felícia |
 Italy | 20 | May | Bernardino da Siena |
| Poland | 20 | May | Anastazy, Asteriusz, Bazyli, Bazylid, Bazylis, Bernardyn, Bernardyna, Bronimir, Iwo, Sawa, Teodor, Wiktoria |
 Slovakia | 20 | May | Bernard |
| USA | 20 | May | Bernadette, Bernardina, Bernardine, Bernetta, Bernita |
| Spain | 28 | May | Agustín, Bernardo, Emilio, Germán |
| Spain | 30 | May | Fernando, Estela, Fernanda, Hernán, Lorena, Hernando |
| USA | 30 | May | Joan, Joani, Joann, Joanna, Joanne, Johanna, Fawn, Fern, Fernanda, Fernando, Ferdinand, Ferdinanda, Ferdinando |
| Poland | 1 | June | Alfons, Alfonsyna, Bernard, Fortunat, Gracjana, Hortensjusz, Jakub, Konrad, Konrada, Magdalena, Nikodem, Świętopełk, Symeon |
| Spain | 11 | June | Benito, Bernabé, Aléida |
| Poland | 15 | June | Abraham, Angelina, Bernard, Jolanta, Leona, Leonida, Nikifor, Wit, Witold, Witołd, Witolda, Witosław, Wodzisław |
| France | 27 | June | Fernand |
| Poland | 10 | August | Asteria, Bernard, Bogdan, Borys, Filomena, Laurencjusz, Prochor, Wawrzyniec, Wierzchosław |
| Croatia | 20 | August | Bernard cn., Branko, Dino |
 Czechia | 20 | August | Bernard |
| France | 20 | August | Bernard, Samuel |
| Italy | 20 | August | Bernardo di Chiaravalle |
| Lithuania | 20 | August | Bernardas, Neringa, Tolvinas |
| Poland | 20 | August | Bernard, Jan, Sabin, Samuel, Samuela, Sieciech, Sobiesław, Świeciech, Szwieciech |
| Spain | 20 | August | Bernardo Abad |
| USA | 20 | August | Barnard, Bernard, Bernardo, Filbert, Philbert, Rey, Reyna, Reynalda, Reynaldo, Reynold |
| Poland | 21 | August | Adolf, Adolfa, Adolfina, Alf, Bernard, Emilian, Filipina, Franciszek, Joanna, Kazimiera, Męcimir |
| Poland | 13 | September | Aleksander, Aureliusz, Eugenia, Filip, Lubor, Materna, Morzysław, Szeliga |
| Poland | 14 | September | Bernard, Cyprian, Roksana, Siemomysł, Szymon |
| Poland | 14 | October | Alan, Bernard, Dominik, Dzierżymir, Fortunata, Kalikst, Kaliksta |
| Poland | 21 | October | Bernard, Celina, Dobromił, Elżbieta, Hilary, Klemencja, Pelagia, Pelagiusz, Urszula, Wszebora |
| Spain | 25 | October | Bernardo Calvó |
| Poland | 4 | December | Barbara, Berno, Biernat, Chrystian, Hieronim, Krystian, Piotr |
| USA | 27 | December | Adwin, Alvern, Alverna, Alvin, Alvina, Alwin, Elvin, Elvina, Elvira, Elvita, Elwin |
Norway 
Sweden 
Latvia 
Estonia