Benjamin's firstborn son Bela had nine sons (1 Chronicles 8:1; Numbers 26:40). Ard, one of the nine sons, is called Benjamin’s son in the Hebrew sense, meaning descendant (Genesis 46:21). He was the founder of the Ardite family, a smaller group within Benjamin’s larger tribe. In the book of 1 Chronicles (8:3), Ard is called Addar. This difference in spelling is probably because of a mistake made when copying the text long ago.
Ard, Ardite
From Tyndale Bible Dictionary, adapted by Mission Mutual. CC BY-SA 4.0.