Well, yes and no. There's a lot to it... Culture, interaction, environment to be a few. Some traditions can stand the test of time, others may not. Families have patterns, and those patterns change accordingly to the birth or death of members in that family.

[At least, that's how he thinks he can best explain it. It's a little disconcerting how Death's thinky face is a lot like Hikaru's, but then... Same body. Then again, different personalities.]