Miami, FL immigration attorney Ruth Jean talks about how many family members can be admitted under a family preference immigrant visa. She states that family preference immigration visas differ from employment-based visas in several ways. In this process, a U.S. citizen may petition not only for a spouse and children but also for siblings. Additionally, when a U.S. citizen petitions for a brother or sister, that sibling’s children under the age of twenty-one may also qualify for admission as derivative beneficiaries. This system allows extended family members to reunite and establish lawful residence in the United States.