Does deaths really come in threes?

well my papa died june 4th, my great granny witt died two weeks before he died, and now my great grandpa died yesterday. my moms bf said that deaths come in three yesterday and then today my memaw "you know deaths come in threes." well my mamas bf just said that and is that true. her boyfriend went threw three deaths 5 years ago(his mama, 2 close bestfriends). my step grandma just went threw three deaths( my great-granny witt, her grandma, my papa) and so did me. it seems true to me.