No; not unless your league specifically states they are illegal.
Brett Harts Brothers and sister is Heart Destiny
Brett hulls father Bobby Hull toughed him to play along with his brothers. After one of Bobby's games Bobby and Brett followed by the brothers would play a game.
MLB player Brett Cecil bats right.
MLB player Brett Gardner bats left.
MLB player Brett Hayes bats right.
MLB player Brett Jackson bats left.
MLB player Brett Lawrie bats right.
MLB player Brett Marshall bats right.
MLB player Brett Oberholtzer bats left.
T.J Wilson. He is not related to the hart famiy but he was close to Owen hart and Brett hart. And Owen hart and Brett hart are brothers.
No it is not illegal but you need a permit
592.