TBH Im missing Zlatko Zahovič :)

Lots of names. But here is my update on them.
males: Several names have s or z when it should be a š or ž in order as they appear on the list Žan (You did listed it at the end, but Zan doesn't exist as a Slovenian name), Anže, Žiga, Aljaž, Matevž, Gašper. Mark is missing o at the end - it should be Marko.
There are several names that need to be removed for several reasons, but mainly because they are not Slovenian names, just some new names that parents in the new age are naming kids today, those are Liam, Gal, Patrik, Leon, Anej, Tian, Val, Lukas, Teo, Svit, Rene, Enej, Izak, Jurek, Kosta, Lukaš, Maja (it's a female name), Neven. You can instead use these common Slovenian male names: Primož :), Janez, Matjaž, Borut, Robi, Franc, Franci, Francelj, Anton, Tone, Jože, Matej, Milan, Branko, Igor,
females: Names that need to replace s/z with š/ž letters - Maša, Neža, Živa, Nuša, Žana.
One name needs to be modified, because it is missing the 2nd letter a - Barbara, Elizabeta instead of Elisabet, Maria and Gabriela are missing j, so it should be Marija and Gabrijela. Nevena is missing k so it should be Nevenka. Alja should be Anja.
And here are the female names that need to be removed - Hana, Lina, Lia, Sofia (there is already the right one - Sofija) Laura, Naja, Andra, Anais,
So here is also a list of common female names: Nataša, Mojca, Nina, Andreja, Jožica, Anamarija, Tina, Tatjana, Tanja,
surnames: a lot are missing letter č/š/ž - Babič, Brankovič, Dragič, Grbič, Jankovič, Jež, Kaluža, Kovačevič, Križ, Križman, Lončar, Plešec, Vlašič, Žitnik.
Names to be removed as they are already updated with č/š later on the list - Korosec, Kovac, Kovacic.

Thanks, here is an updated version:

#Slovenia
SLV = {
male = {
names = {
Luka Filip Jakob Nik Marko Tim Jan Vid Jaka Lovro Lan Maks Nejc Anže David Žiga Oskar Aljaž Miha Matic Matija Maj Aleks Erik Martin Bine Rok Tine Tilen Matevž Urban Bor Adam
Jure Gašper Domen Marcel Nace
Aleš Andrej Bogdan Boštjan Dalibor Damjan Denis Damir Davor Dejan Dominik Dušan Erazem Gregor Grega Ivan Jani Jovan Klemen Kristjan Maksim Miro Niko Rade Robert Roman Samo Simon Stanko Stanislav Tomaž Viktor Žan

Primož Janez Matjaž Borut Robi Franc Franci Francelj Anton Tone Jože Matej Milan Branko Igor Zlatko

Bojan Zdenko Srečko Matjaž Slaviša Petar Jaka Vanja Sandi Tomi Tamar Adrian Danijel Svit Andraž Benjamin Kenan Marcel Josip Sandro Blaž Andrés Aljoša Jasmin Valter Samir Milivoje Mišo
}
}
female = {
names = {
Zala Eva Ema Mia Lara Maša Sara Ana Julija Neža Nika Ela Lana Zoja Klara Ajda Brina Kaja Vita Sofija Mila Zarja Iza Neja Ula Nina Manca Tinkara Živa Taja Alina Maja Tia Lili Iva Tara Gaja
Lucija Katarina Zara Lea Nuša Žana Pika
Anja Barbara Bernarda Brigita Dajana Dijana Dragica Ela Elizabeta Eva Marija Gabrijela Hana Irena Ivana Jasna Katja Kristina Lara Leja Liza Monika Nevenka Petra Rebeka Renata Romana Simona Tea Vanja Veronika Zinka

Nataša Mojca Andreja Jožica Anamarija Tina Tatjana Tanja
}
}
surnames = {
Babič Brankovič Dragič Furlan Gasper Grbič Horvat Jakolin Jankovič Jež Kaluža Kaspar Klements Kokot Kolar Kopitar Kovačevič Kozel Križ Križman Lončar Medved Mlakar Novak Perko Plešec Plesko Resnik
Strnad Struna Vlašič Žitnik Zupan
Horvat Kovačič Krajnc Zupančič Kovač Potočnik Mlakar Vidmar Kos Golob Turk Božič Kralj Korošec Zupan Bizjak Hribar Kotnik Kavčič Rozman Kastelic Oblak Žagar Petek Hočevar Kolar Košir Koren Klemenčič Knez Kraljč Kovačič Kramar Korenčič Kovačič Kraljč Kramar Zahovič Prašnikar Verdenik Katanec Kek Stojanović Benedejčič Vekić Turk Stojanović Bijol Balkovec Karničnik Janža Brekalo Drkušić Zec Čerin Lovrić Elšnik Petrovič Svetlin Zeljković Šturm Sešlar Šporar Šeško Vipotnik Vidovšek Šoštarič Karič Bajrić Ratnik Stanković Verbič Zabukovnik Tijanić Kurtić Iličić Repas Jovanović Kramer Vombergar Matko Celar Cesar Jokić Kurtić Birsa Handanović Novaković Brečko Gliha
}
}

Nice. Only little mistake from now on.
male name Andrés isn't Slovenian and should be erased. And while there are a lot of Croatian/Serbian/Bosnian... names. Those are all fine since a lot of people from all the former Yugoslavian Republic live here. But Andrés really stands out. Is it Spanish?
female and last names are fine.

The update has been released, thank you for your help!