Is your spellcheck getting you? I've never heard Efren called "Beta" and you've just called him that twice. Bata on the other hand....
My grandfather often called me "Boy." If I only knew he was referring to Boy Bicol, maybe I wouldn't have been so offended.
On the other hand, my grandmother would often call me "Butirug," which as far as I can tell is a slang for "penis." I guess that means "boy." Not surprisingly, my mother would often called me "Butchie" or "Butch." I suppose that was short for "Butirug." But, my daily nickname was Bong or Bobong. I say, "was," but the reality is that it still is. My mother says, "Freddie" when she's talking about me, but when she's addressing me, it's the doorbell moniker: Bong.
Even today, my 80-year old mother addresses me as "Bong" in texts. It confuses everyone, especially my sister who has called me "Bird" for nearly all of my life. Such is the life of a Filipino. So many nicknames, all of which I answer the bell. The doorbell, that is.
IMO, of course.
Freddie / Butirug/ Bong / Bobong/ Bird <~~~ Penis