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I like this name!
It’s been quite consistently popular in several different countries, however it has quite sharply risen in the USA, so whether or not it will be considered dated soon is relative to where you are. If you are in the USA, then I think that although the name itself may not become super tied to recent years, combined with Luca and Lucas it could be.
In other countries, such as Belgium, England and Wales and Finland, the popularity has stayed quite similar across the years available, so it may appear less dates in the future (though, again, it’s combined popularity with Lucas and Luca may tell a different story).
Personally, I don’t think a name becoming dated is really a bad thing. Luka is a nice name and if you like it, I don’t think there should be an issue. But if you do find it being dated a problem, that’s okay! Here are some names I think are similar:
Adam, Dominik, Emil, Erik, Joseph, Julian, Leo, Levi, Leon, Maximilian, Niko, Nikola, Toma, Tom, Victor, Marko, Milo, Oliver, Oscar, Oskar, Rafael, Raphael, Vito
Hope some of this helped!