International Standard Bible Encyclopedia

o'-na ('onam, "vigorous"; compare ONAN):

(1) "Son" of Shobal "son" of Seir the Horite (Genesis 36:23 1 Chronicles 1:40).

(2) "Son" of Jerahmeel by Atarah; perhaps the name is connected with Onan son of Judah (1 Chronicles 2:26, 28).