Complex sentence: Margaret and Earl moved to Jackson Rancheria where they raised four sons, Earl Jr., Dennis, Robert, and Adam, as well as Margaret's brothers and sister, Irvin (Bo), Clarence, Gary, and Donna.
Split into simpler sentences: Margaret and Earl raised four sons, Earl Jr., Dennis, Robert, and Adam, on the Rancheria. They also raised Margaret's three brothers and one sister, Irvin (Bo), Clarence, Gary, and Donna.