September's NameDays in Lithuania feature a rich mix of traditional and international names. Many unique Lithuanian names, often denoting strength or nature, populate the calendar, such as Gytautas, Vismantas, and Tautgirdas. There are also several pairs of masculine and feminine forms, like Bronislovas and Bronislova, or Gedvinas and Gedvine. Justina is the only name appearing twice, celebrated on both the 5th and 26th. The month concludes with well-known names like Gabrielius, Mykolas, and Sofija.
| Country | Day | Month | Names |
 Lithuania | 1 | September | Burvile, Egidijus, Gytautas, Gytis |
| Lithuania | 2 | September | Ingrida, Protenis, Steponas, Vilgaude |
| Lithuania | 3 | September | Bronislova, Bronislovas, Mirga, Sirtautas |
| Lithuania | 4 | September | Gemante, Girstautas, Rozalija, Roze |
| Lithuania | 5 | September | Dingaile, Erdenis, Justina, Stanislova, Stase |
| Lithuania | 6 | September | Faustas, Tautene, Vaistautas |
| Lithuania | 7 | September | Bartas, Barte, Palmira, Regina |
| Lithuania | 8 | September | Daumante, Klementina, Liaugaudas, Vytautas |
| Lithuania | 9 | September | Argintas, Ramute, Sergejus |
| Lithuania | 10 | September | Girminte, Konstancija, Koste, Mikalojus, Tautgirdas |
| Lithuania | 11 | September | Augantas, Gytaute, Gyte, Heiga |
| Lithuania | 12 | September | Gvidas, Marija, Tolvaldas, Vaidmante |
| Lithuania | 13 | September | Barmantas, Barvyde, Mangailis |
| Lithuania | 14 | September | Eisvina, Eisvinas, Krescencijus |
| Lithuania | 15 | September | Eugenija, Nikodemas, Rimgaile, Vismantas |
| Lithuania | 16 | September | Edita, Joginte, Kamile, Rimgaudas |
| Lithuania | 17 | September | Pranas, Pranciskus, Sintautas, Sintaute |
| Lithuania | 18 | September | Galmante, Mingailas, Stefa, Stefanija |
| Lithuania | 19 | September | Girvinas, Vilhelmina, Vyte |
| Lithuania | 20 | September | Eustrachijus, Fausta, Tautgirde, Vainoras |
| Lithuania | 21 | September | Mantvilas, Matas, Viskinte |
| Lithuania | 22 | September | Tarvinas, Tomas, Virmante |
| Lithuania | 23 | September | Galintas, Galinte, Linas, Tekle |
| Lithuania | 24 | September | Gedvinas, Gedvine, Gerardas |
| Lithuania | 25 | September | Aurelija, Kleopas, Ramvyde, Vaigintas |
| Lithuania | 26 | September | Grazina, Juste, Justina, Kipras, Vydenis |
| Lithuania | 27 | September | Adalbertas, Damijonas, Daugile, Kesgaile, Kovaldas |
| Lithuania | 28 | September | Salemonas, Tautvydas, Vaclovas, Vacys, Vientaute |
| Lithuania | 29 | September | Gabrielius, Michalina, Mykolas, Mykole, Rapolas |
| Lithuania | 30 | September | Bytaute, Jeronimas, Sofija, Zymantas |
