co-uncle

listen to the pronunciation of co-uncle
İngilizce - İngilizce
of a man, an uncle of one's niece or nephew who is not one's brother; a co-brother-in-law as common uncle to the children of two men's married siblings
a man's brother, as uncle in common to the children of a third sibling

My nephew came up for the summer with my brother and co-uncle George.

co-uncle