(1) "Son" of Shobal "son" of Seir the Horite (Ge 36:23; 1Ch 1:40).
(2) "Son" of Jerahmeel by Atarah; perhaps the name is connected with Onan son of Judah (1Ch 2:26,28).
The International Standard Bible Encyclopedia
Onam
The International Standard Bible Encyclopedia, James Orr (1915). Public domain, from the CrossWire SWORD module.