| Country | Day | Month | Names |
 USA | 28 | January | Carlotta, Charleen, Charlene, Charlotta, Charlotte, Charmaine, Manfred |
 Hungary | 6 | February | Dorottya, Dóra |
| USA | 6 | February | Amanda, Dolly, Dora, Doreen, Dorothea, Dorothy, Dorthy, Dottie, Manda, Mandi, Mandy, Ron, Rona, Ronald, Ronalda, Ronaldo, Ronnie, Titus |
 Austria | 26 | February | Gerlinde, Edigna, Ottokar |
| Austria | 23 | March | Otto, Rebecca, Toribio |
 Italy | 23 | March | Ottaviano |
 Denmark | 9 | April | Otto, Procopius |
 Sweden | 9 | April | Ottilia, Otto |
 Finland | 17 | April | Otto |
 Norway | 27 | April | Charles, Charlotte, Lotte |
 Croatia | 30 | April | Pio V. papa, Josip Cottolengo |
| Austria | 5 | May | Gotthard, Jutta, Sigrid |
| Italy | 5 | May | Gottardo |
| Sweden | 5 | May | Erhard, Gotthard |
| Finland | 12 | May | Lotta |
| Sweden | 12 | May | Charlotta, Lotta |
| Austria | 30 | May | Ferdinand, Johanna, Otto |
| Austria | 7 | June | Anita, Eoban, Gottlieb, Robert |
 Estonia | 20 | June | Karola, Karoliine, Karolin, Kaari, Karlotte, Lota |
| Austria | 30 | June | Bertram, Ehrentrud, Otto |
 Germany | 30 | June | Otto |
| Austria | 1 | July | Aaron, Dietrich, Otto, Theobald |
| Hungary | 2 | July | Ottó |
| Italy | 2 | July | Ottone di Bamberga |
 Poland | 2 | July | Juda, Maria, Martynian, Otto, Piotr, Urban |
| USA | 2 | July | Othello, Otis, Otto, Penelope, Penny, Petunia |
| Poland | 3 | July | Anatol, Jacek, Korneli, Leon, Miłosław, Otto |
| Austria | 17 | July | Charlotte, Donata, Gabriella |
 France | 17 | July | Arlette, Charlotte, Marcelline |
| USA | 20 | July | Edna, Edwin, Edwina, Elias, Elijah, Ellice, Elliot, Elliott, Ellis, Ellison, Neal, Neala, Neil, Neila, Nelson, Niall, Nigel, Niles |
| Austria | 7 | September | Otto, Ralph, Regina |
| USA | 24 | September | Eartha, Ertha, Herta, Hertha, Mercedes, Mercy, Scot, Scott, Scottie, Scotty |
| Austria | 12 | October | Edwin, Gottfried, Maximilian |
| Denmark | 4 | November | Otto |
| Norway | 4 | November | Ottar, Otto |
| Austria | 8 | November | Gottfried, Willehad |
| Germany | 8 | November | Gottfried |
| Poland | 18 | November | Aniela, Cieszymysł, Filipina, Galezy, Klaudyna, Odo, Otto, Roman, Tomasz |
| Sweden | 15 | December | Gottfrid |
