Who is sonics brother

Sonic's siblings is 4 cause the 1st born brother is silver cause when he was born he had his phycik powers and he accidentally used it to travel time the 2nd born was shadow i dont have anything to explain but i know he his sonic's brother 3rd was shes the middle of the five siblings shes from sonic underground and shes the 3rd born the 4th born was sonic himself now the 5th and last is manic hes fromsonic underground