User blog comment:NinjaClockworker/Demon Symbolism Theory(?)/@comment-89.156.125.31-20150315091106/@comment-6986530-20150315203327

pöllö means "stupid" and "owl" in Finnish (according to this post) and pollo in Spanish means "chicken".

Neither of these are relevant to Pollo, the character, whose name was chosen as a shortening of "Apollo" alongside "Arte(mis)". It's just a coincidence--like Michaela's name meaning.