Surname Letonja (Letonja 
) , all around the world, is a rare family name. The family name Letonja is characteristic of Slovenia, where it is quite a common surname, Bosnia and Herzegovina, where it is quite a rare surname, and Austria, where it is a rare surname. Very seldom, Letonja is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Letonja | Austria, Germany, Bosnia and Herzegovina, Chile, Slovenia |
| wilhelm letonja AT (b. 1915) |
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| marko letonja Slovene conductor, SI (b. 1961) |
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| marina letonja SI (b. 1959) |
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| marija šantl-letonja SI |
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| mitja letonja SI |
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Mr, Markus, Mcewan, Stanka, Birgit, Karmen, Tadeja, Thomas, Haydee, Ingrid, Marina, Ivanka, Manfred, Michael, Barbara, Rodrigo, Günter, Tatjana, Thommas, Timotej, Magdalena, Špela, Uschi, Frane, Vlado, Ms, Amy, Rok, Gal, Mary, Sasa, Ales, Robi, Jana, Nina, Matea, Majda, Sašo, Andre, Petra, Peter, Darko, David, Giada, Helge, Heidi, Alexander, and Christian