None of them.
niall
4/5 boys in One Direction has sisters. Zayn has 3 sisters, Louis has 4 sisters, Harry has 1 sister, and Liam has2 sisters.
he has 4 sisters.
Louie has five sisters that are younger than him
Louis Tomlinson
zayn malik
No, but he does have three sisters.
3.
Niall Horan.
There are five members in One Direction.
None. He has one brother.
Louis Tomlinson :)