- Members of the immediate family also called nuclear family may include spouses (parents), brothers, sisters, sons, and daughters. 

- Members of the extended family may include grandparents, aunts, uncles, cousins, nephews, nieces, and siblings-in-law.

- Sometimes these are also considered members of the immediate family, depending on an individual's specific relationship with them.

- Genealogy aims at tracing family lineages through history.