Who counts as a family member
Article 2(2) of the Directive covers the spouse, a registered partner where the host country treats registered partnerships as equivalent to marriage, direct descendants under 21 or dependent, and dependent direct relatives in the ascending line, in each case also those of the spouse or partner. For other dependants, members of the household and partners in a durable relationship, Article 3(2) requires the host country to facilitate entry.
Directive 2004/38/EC (Free Movement Directive)