Genealogy diagram is a type of diagram used to represent FAMILY relationships and lineages. It is also known as a FAMILY tree, which is the most common term for this type of diagram. The term genealogy diagram is derived from the Greek words 'genos' meaning 'RACE' or 'FAMILY' and 'LOGOS' meaning 'STUDY'. This type of diagram is used to trace the ancestry of an individual or FAMILY, showing the relationships between generations. It is often used in genealogical research to help identify ancestors and their descendants. The term 'tree' is often used to refer to this type of diagram, as it typically resembles a tree with branches extending from the trunk.