I mean not neccesarily. Both my parents are at least 15cm shorter than me. My mum is quite tall (looking at averages she falls in the 20th percentile but still is around 175cm) but my dad is average height at 48th percentile. And yet I fall in the 1st to 2nd percentile.

Both my brothers are about as tall as my dad and the only one even close to my height is one of my mother’s cousins.