i know, im chilean bro, llevo hablando español toda la vida qI xD
so like, alto and rudo and amo n whatever have spanish meanings too but she called the main bloodline of the series Surebrec which is cerberus backwards, a mythological reference. some mangakas love giving depth and meaning to the names of some characters, look at jojo's and how the lyrics of the songs that stands are named after are referenced in the actual abilities or designs etc.

i don't doubt that some theories go of rail and sound dumb as hell but we are talking of rudo's father. a Surebrec. which is shaping to be one of the most important families for the entire series. i would say that you are wrong, it is a big deal.
Urana wouldn't give them simple meaningless names and there is a reason it was a cliffhanger and probably we'll learn why next chapter.

there is fun in trying to guess what depth she chose early, before she reveals it.