Latvian NameDays in September present a diverse array of names, with most dates featuring unique sets. However, a few names enjoy multiple celebration days throughout the month. Klaudija appears on both September 3rd and 5th, while Ilgonis is celebrated on September 8th and 27th. Knuts also has two distinct name days, occurring on September 24th and 26th. Overall, the month showcases a blend of traditional and distinctive Latvian names.
| Country | Day | Month | Names |
 Latvia | 1 | September | Austrums, Ilmars, Iluta, Irisa, Verena |
| Latvia | 2 | September | Eliza, Elize, Lizete, Zete |
| Latvia | 3 | September | Bella, Berta, Klaudija, Klaudijs, Slaida |
| Latvia | 4 | September | Dzintars, Dzintra |
| Latvia | 5 | September | Klaudija, Perse, Persijs, Vaida |
| Latvia | 6 | September | Balva, Magnuss, Maigonis |
| Latvia | 7 | September | Ermins, Regina, Valdone |
| Latvia | 8 | September | Amirs, Ilga, Ilgonis, Nelda |
| Latvia | 9 | September | Bruno, Telma |
| Latvia | 10 | September | Albertine, Jausma |
| Latvia | 11 | September | Girts, Nansija, Signe, Signija |
| Latvia | 12 | September | Albins, Erna, Eva, Evita, Selga |
| Latvia | 13 | September | Iza, Izabella, Izanda, Izida |
| Latvia | 14 | September | Koknesis, Norberts, Sanda, Sanita, Santa |
| Latvia | 15 | September | Gunvaldis, Nikodems, Sandra |
| Latvia | 16 | September | Asja, Asnate |
| Latvia | 17 | September | Solvita, Vaira, Vairis, Vera |
| Latvia | 18 | September | Alinta, Elita, Gizela, Liesma |
| Latvia | 19 | September | Muntis, Varnesis, Verners |
| Latvia | 20 | September | Guntra, Marianna |
| Latvia | 21 | September | Matiss, Modris, Nara |
| Latvia | 22 | September | Maigurs, Maris, Marisa, Mariss, Morics |
| Latvia | 23 | September | Ivanda, Omula, Vanda, Veneranda |
| Latvia | 24 | September | Agris, Agrita, Knuts |
| Latvia | 25 | September | Rauls, Roderiks, Rodrigo, Vingra |
| Latvia | 26 | September | Egmonts, Gundars, Knuts, Kurts |
| Latvia | 27 | September | Adolfs, Ilgonis, Ronalds |
| Latvia | 28 | September | Gaita, Kaira, Lana, Sergejs, Svetlana |
| Latvia | 29 | September | Ivonna, Mihails, Mikelis, Mikus |
| Latvia | 30 | September | Abgara, Elma, Lamekins |
