The ur-ancestor of all mammals is believed to be a small, shrew-like creature.

The proto-ancestor of modern humans is believed to have lived in Africa.

My great-grandfather is my ur-ancestor.

Ancestralism is an important cultural practice in many societies.

The study of ancestralities provides insights into our diverse cultural heritage.

The apical ancestors of this family are highly respected.

Many species share common ancestors.

My Ur-ancestors came from a small village in ancient Mesopotamia.

The Ancells are a lovely family.

My friend's last name is Ancell.