As many as he wanted to have...
one
5 brothers 1 sister
that had 4 brows and 2 sister
George Clooney has one older sister named Adelia.
He had three brothers, two sisters, three half-brothers, and one half-sister.
He had 11 brothers and sisters.
There are three brothers and two sisters.
There are 4 brothers and 3 sister's all up. Assume your one of the brothers - hence you have 3 brothers and 3 sisters. However any one of your sisters, would have 4 brothers and 2 sisters.
One sister, two brothers
Athena had no brothers or sisters.
he had no brothers or sisters
2 brothers and sisters