Abijah is a person named in the Old Testament

Old Testament

The Old Testament, of which Christians hold different views, is a Christian term for the religious writings of ancient Israel held sacred and inspired by Christians which overlaps with the 24-book canon of the Masoretic Text of Judaism...

. She was the daughter of a Zechariah, possibly Zechariah the son of Jeberechiah (2 Chr. 29:1; compare Isa. 8:2), and afterwards the wife of Ahaz

Ahaz

Ahaz was king of Judah, and the son and successor of Jotham. He is one of the kings mentioned in the genealogy of Jesus in the Gospel of Matthew....

, and mother of Hezekiah

Hezekiah

Hezekiah was the son of Ahaz and the 14th king of Judah. Edwin Thiele has concluded that his reign was between c. 715 and 686 BC. He is also one of the most prominent kings of Judah mentioned in the Hebrew Bible....

. She is also called Abi (2 Kings 18:2).

Some writers consider that Abijah is the almah or virgin (at the time of the prophecy) in the Immanuel prophecy in Isaiah 7:14

Isaiah 7:14

Isaiah 7:14 is a verse of the Book of Isaiah in which the prophet Isaiah, addressing king Ahaz of Judah , promises the king a sign that his oracle is a true one...

, and that the child who will be an infant when Rezin

Rezin

King Rezin of Aram or Rasin of Syria in DRB ruled from Damascus during the 8th century BC. During his reign he was a tributary of King Tiglath-pileser III of Assyria....

 and Pekah

Pekah

Pekah was king of Israel. He was a captain in the army of king Pekahiah of Israel, whom he killed to become king. Pekah was the son of Remaliah ....

 are defeated by Tiglath Pileser III may be the future heir, Hezekiah

Hezekiah

Hezekiah was the son of Ahaz and the 14th king of Judah. Edwin Thiele has concluded that his reign was between c. 715 and 686 BC. He is also one of the most prominent kings of Judah mentioned in the Hebrew Bible....

.