What does Abijah (Abijam) mean in the Bible?

Dictionary

Bridgeway Bible Dictionary - Abijah (Abijam)
The Judean king Abijah (or Abijam) was one of several people of that name in the Bible. He was the second king of Judah after the division of the kingdom, and reigned from 913 to 910 BC (1 Kings 15:1-2).
Abijah was not wholly loyal to Yahweh, for he tolerated false religion in Judah (1 Kings 15:3). However, he was not as bad as his contemporary in Israel, Jeroboam, who had set up an official rival religion in the northern kingdom. When Abijah went to war with Jeroboam, he presumed God would give him victory because his kingdom was based on the Davidic dynasty and the Levitical priesthood (2 Chronicles 13:1-12). He did, in fact, defeat Jeroboam, not because God was in any way obliged to help him, but because his soldiers fought in an attitude of genuine reliance on God (2 Chronicles 13:13-22).