My theory is correct. I can never sleep properly when at home.

I should write this while I still remember. We are related by relation, not by blood. This is how:

My late paternal grandpa's eldest brother Atuk Long married Nek Long who is Uncle Razali's mom's younger sister. Uncle Razali calls dad's Mak Long as Mak Ngah.

So Uncle Razali and dad are cousins by relation. Uncle Razali's kids, nieces and nephews are my second cousins by relation.