| Country | Day | Month | Names |
 Estonia | 9 | January | Veli, Veljo, Vello, Velvo, Veigo, Veiko, Väiko, Venda, Vendo, Venno |
| Estonia | 19 | January | Hendrik, Henrik, Henri, Heino, Henn, Henno, Enn, Enno, Eno, Heik, Heiki, Heiko, Heigo |
 Austria | 23 | January | Hartmut, Heinrich, Nikolaus |
| Estonia | 7 | February | Richard, Riho, Riko, Riku |
 Poland | 14 | February | Adolf, Adolfa, Adolfina, Alf, Cyryl, Dobiesława, Dobisława, Józef, Józefa, Konrad, Konrada, Krystyna, Lilian, Liliana, Mikołaj, Niemir, Niemira, Walenty, Zenon, Zenona |
 Bulgaria | 1 | March | Evdokiya, Marta, Martin, Martina, Boiko, Boyko |
 Greece | 3 | March | Kleonikos |
 Hungary | 10 | March | Ildikó |
| Poland | 21 | March | Benedykt, Filemon, Lubomira, Mikołaj |
| Bulgaria | 28 | March | Albena, Boyan, Boyana, Boyka, Boyko, Boiko, Boicho, Boycho |
| Bulgaria | 19 | April | Anastas, Velichka, Velika, Veliko, Velichko, Velko, Svetla, Svetozar |
| Poland | 9 | May | Beatus, Bożydar, Grzegorz, Job, Karolina, Mikołaj |
| Greece | 17 | May | Andronikos |
| Poland | 19 | May | Augustyn, Celestyn, Iwo, Mikołaj, Pękosław, Piotr, Potencjana |
 Denmark | 1 | June | Nikomedes |
 Finland | 1 | June | Teemuc, Nikodemus |
| Poland | 1 | June | Alfons, Alfonsyna, Bernard, Fortunat, Gracjana, Hortensjusz, Jakub, Konrad, Konrada, Magdalena, Nikodem, Świętopełk, Symeon |
| Poland | 2 | June | Efrem, Erazm, Eugeniusz, Marcelin, Maria, Marianna, Mikołaj, Nicefor, Piotr, Racisław |
| Poland | 9 | July | Anatolia, Heloiza, Hieronim, Łucja, Lucja, Ludwika, Lukrecja, Mikołaj, Patrycjusz, Weronika, Wszebąd, Zenon, Zenona |
| Greece | 14 | July | Nikodimos |
| Hungary | 26 | July | Anna, Anikó |
| Greece | 29 | July | Kallinikos |
| Greece | 30 | July | Adronikos |
| Bulgaria | 2 | August | Nikodim |
| Austria | 3 | August | August, Lydia, Nikodemus |
| Denmark | 3 | August | Nikodemus |
| Poland | 3 | August | August, Augusta, Krzywosąd, Lidia, Nikodem, Symeon, Szczepan |
| Estonia | 7 | August | Vaido, Vaigo, Vaiko, Hiljar, Hiljo |
 Slovakia | 29 | August | Nikolaj, Nikola |
 Croatia | 10 | September | Nikola Tolentino, Pulherija, Lijepa |
| Hungary | 10 | September | Nikolett, Hunor |
| Poland | 10 | September | Aldona, Łukasz, Mikołaj, Mścibor, Pulcheria |
| Hungary | 15 | September | Enikő, Melitta |
 Latvia | 15 | September | Gunvaldis, Nikodems, Sandra |
 Lithuania | 15 | September | Eugenija, Nikodemas, Rimgaile, Vismantas |
| Poland | 15 | September | Albin, Budzigniew, Maria, Nikodem |
| Croatia | 25 | September | Nikola of Flue, Aurelija, Kleofa, Firmin |
| Estonia | 29 | September | Miikael, Mihkel, Mikk, Miko, Miku |
| Finland | 29 | September | Mikko, Mika, Mikael, Miki, Mikaela, Miika, Miikka, Miko, Miska |
| Greece | 30 | September | Stratonikos |
| Poland | 13 | October | Daniel, Edward, Gerald, Geraldyna, Maurycy, Mikołaj, Siemisław, Teofil |
| Bulgaria | 8 | November | Angel, Angelina, Arhangel, Gavrail, Gavril, Emil, Emilia, Emiliana, Mihaela, Mihail, Ognyan, Ognyana, Plamen, Plamena, Rada, Radka, Radko, Rafail, Raia, Raika, Raina, Rangel, Emiliya, Emiliyana, Emiliyan, Lina, Mila, Milen, Milyo, Mihaela, Mihail, Radivoy, Radoslav, Radoslava, Radostin, Radostina, Raiko, Raycho, Rangel, Rafail, Raya, Rusi |
| Poland | 13 | November | Arkadiusz, Arkady, Brykcjusz, Eugeniusz, Jan, Mikołaj, Stanisław, Walentyn |
| Austria | 14 | November | Nikolaus, Sidonia |
| Croatia | 14 | November | Nikola Tavelic, Ivan Trogirski |
 Czechia | 20 | November | Nikola |
| Austria | 6 | December | Denise, Henrike, Nikolaus |
| Bulgaria | 6 | December | Nikola, Nikolai, Nina, Kolyo, Nenka, Niko, Nikolay, Nikolina, Nitza |
| Croatia | 6 | December | Nikola bikup, Nikša |
| Denmark | 6 | December | Nikolaus |
| Estonia | 6 | December | Nigulas, Nigul, Nikolai, Niilas, Niilo, Nils, Klaus, Laas, Laus |
| Finland | 6 | December | Niilo, Niko, Niki, Nikolas, Niklas, Nikolai, Niila |
| Greece | 6 | December | Nikolaos, Nicolas, Nikos, Nick, Nikoletta |
| Latvia | 6 | December | Klavs, Niklavs, Nikolajs |
 Norway | 6 | December | Nikolai, Nils |
| Poland | 6 | December | Dionizja, Emilian, Jarema, Jarogniew, Mikołaj |
 Sweden | 6 | December | Niklas, Nikolaus |
 USA | 6 | December | Claus, Ira, Nicholas, Nichole, Nick, Nicklaus, Nickolas, Nico, Nicolas, Nicole, Nicolette, Nikki, Niko, Nikolas |
| Estonia | 9 | December | Raido, Raidu, Raigo, Raiko, Raid, Raik, Rait |
