Ott's name day is May 9 in Estonia.
Ott is a relatively rare name, most prominently found in Estonia where it’s a traditional masculine given name. Its origins lie in Germanic roots, stemming from shortened forms of names like Otto or Odo, historically signifying wealth. While uncommon in the USA, it’s gaining slight recognition due to its unique sound. The name carries a mood of quiet strength and reliability, suggesting honesty and integrity. It’s overwhelmingly masculine in its identity, and its simplicity offers a modern appeal. Its historical context provides a connection to Germanic heritage and Baltic culture.
| 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 |