Nice to see another I1 member!
Not as rare as it used to be: https://www.yfull.com/tree/I-M227/, but still somewhat "rare". I-M227 is downstream of Z2336 and thus DF29, DF29 is the most common branch of I-M253 and likely formed in Northern Europe somewhere. Perhaps you ancestor came to Bosnia-Hercegovinia with Germanic migrations? Perhaps Goths, Gepids, Herules, etc?