Charles Aubrey Eaton in the context of "Madison Avenue"

An uncle is usually defined as a male relative who is a sibling of a parent or married to a sibling of a parent, as well as the parent of the cousins. Uncles who are related by birth are second-degree relatives. The female counterpart of an uncle is an aunt, and the reciprocal relationship is that of a nephew or niece. The word comes from Latin: avunculus, the diminutive of avus (grandfather), and is a family relationship within an extended or immediate family. A popular colloquial term in English is Unc.

In some cultures and families, children may refer to the cousins of their parents as uncle (or aunt). It is also used as a title of respect for older relatives, neighbours, acquaintances, family friends, and even total strangers in some cultures, for example Aboriginal Australian elders. Using the term in this way is a form of fictive kinship.

William Robb Eaton (December 17, 1877 – December 16, 1942) was an American businessman, lawyer, Spanish-American War veteran, and politician who served two terms as a U.S. Representative from Colorado from 1929 to 1933.

He was the nephew of Charles Aubrey Eaton.