चाचा

Also known as brother of parent, parent's brother, brother-in-law of parent, parent's brother-in-law

alt=1929 photograph of United States Representative Charles A. Eaton and his nephew Rep. William R. Eaton.|thumb|United States Representative Charles Aubrey Eaton|Charles A. Eaton (right) and his nephew Rep. [[William R. Eaton (left)]] 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 , the diminutive of avu