It's more common, re siblings, for a baby/toddler sibling, who can't pronounce a name correctly, to give another child a mispronounced name that the family then picks up and carries on. Or when a tiny child has trouble pronouncing his or her own name and the family then uses it.
Beto was arrogant, spouted lefty crap ( he wouldn't have voted for Kavanaugh, is a gun grabber, wants SOCIALIZED HEALTH CARE, trashed President Trump etc. ), and looked lousy. Unless there is MASSIVE voter fraud, I really don't see him beating Ted.
Yes. I had a relative named Herbert. His little brother couldn't pronounce "brother" yet. It came out as "bwuzzo." That changed to "buzzo." Everyone in the family, even his parents, started to call him "Buzz" and that lasted the rest of his life. In school and where he worked and even at his funeral. No one ever called him Herbert.