State Police said an investigation in August 2012 led to the arrest of 36-year-old Timothy Robinson and 41-year-old James Robinson.
After a three-day trial, jurors recommended a sentencing of life plus 220 years for James.
They suggested a life sentence plus 70 years for Timothy, who was already serving 20 years for a previous case involving incest and sex abuse of a minor.
Timothy Robinson was found guilty of sodomy of a victim under 12, incest of a victim under 12 and use of a minor in a sexual performance.
James Robinson was found guilty of seven counts of using a minor in a sexual performance, five counts of sexual abuse of a victim under 12 and two counts of sexual abuse.