Aptronyms are just coincidences, but nominative determinism holds that the name actually causes the outcome (nomen est omen), for a host of dubious-sounding reasons.
So "trump" means both "A good, trusty person" and "An act of breaking wind from the anus". Not sure what that says about nominative determinism. I wonder what my dentist, Fred Bicuspid, would say about all this.