I remember reading something about peoples personalities being vaguely related to their names which makes even less sense. Unless peoples names subtlety influence their behavior. Perhaps if these blood type ideas are so prevalent in Korea and everyone from a very young age is aware of their blood type they might have a self fulfilling prophecy.
The names have a decent basic explanation. Names are stereotyped, exist on popular culture and have a bit of language influence (think bouba/kiki). Since some of the personality is inherited, parents' name preference will end up aligning slightly with the whole population which will end up aligning with the kids' behaviours.
Okay but what are the odds of someone named “Doug Bowser” becoming president of Nintendo of America without nominative determinism having at least a grain of truth.
