Genealogy is the study of family history. It is the study of family relationships and ancestry (parents, grandparents, great-grandparents, etc.). It is a popular hobby in the United States and in many other countries.

Some people show their family history using a family tree. A family tree is a diagram of the members of a family. With a family tree you use lines to show how people are related, for example, people who are married or have children.