A family is a group of people related either by consanguinity (by recognised birth) or affinity (by marriage or other relationship).
Family nouns in English are unusual insofar as they tend to be masculine or feminine. Masculine nouns include bachelor, brother, dad, daddy, father, fiancé, nephew, son, uncle, widower, whereas feminine nouns include aunt, daughter, divorcée, fiancée, ma, mam, mammy, mother, mom, mommy, mum, mummy, niece, sister, spinster, widow, wife. Most of these form masculine-feminine pairs. There are also some common gender nouns such as child, cousin, family member, parent, sibling, spouse.
Students, particularly at elementary level, like to talk about their families as it relates to their personal lives. Elementary students may struggle to describe family members' occupations without resorting to a dictionary.