Shaha Amran Miah, 49, known as Jai; Shaha Alman Miah, 47, known as Ali; and Shah Joman Miah, 38, known as Sarj all pleaded not guilty.
Shaha Amran Miah was found guilty of 16 sexual offences against three girls, including rape, as well as two charges of intimidation and one of kidnap.
Shah Joman Miah was convicted of sexually abusing three children and among 40 offences, there were nine counts of rape of a child.
Shaha Alman Miah was sentenced to a 14-year extended sentence - with 10 years in prison and four years on licence.
Shaha Alman Miah was found guilty of three counts of sexual activity with a child.
