Ayyab

Ayyab was a ruler of Aštartu during the Amarna period of the Egyptian Empire.
According to the Amarna letters, cities/city-states and their kings in the region — just like countries to the north, such as Hatti of the Hittites, fell prey to a wave of attacks by ʿApiru raiders. The Amarna correspondence corpus covers a period from 1350–1335 BC.
Another ruler of Aštartu cited in the Amarna letters is Biridašwa. The letters do not clearly indicate their title, leading some scholars to describe them as kings of Damascus while others believe they were high Egyptian officials, possibly mayors.

Amarna Archive

The Amarna Archive has 3 references to Ayyab. He authored one letter to the Pharaoh. He is mentioned in EA 256, a letter by Mutbaal of Pihilu, one of the sons of the rebellious Labaya.
The chronological order of events may indicate that Ayyab ruled prior to Biridašwa.

Authored

Amarna Letter EA 364

In the Amarna Archive, Ayyab is the author of one letter to the Egyptian pharaoh. He is in conflict with the city of Hazor to the northwest.

Mentioned

Amarna Letter EA 256

A letter from Mutbaal of Pihilu to the commissioner Yanhamu, rejecting rumors that he was concealing Ay-'ab.

Speak to Yanḥamu, my lord, a message from Mut-Baʿli, your servant. I fall at the two feet of my lord.
How is it said in your presence: "Mut-Baʿli ran away; ʾAy-ʾab"? How can the king of Pihilu run away from the commissioners of the king, his lord? As the king, my lord, lives, as the king, my lord, lives, I swear that ʾAy-ʾab is not in Pihilu! See, he has not been for two months. Look, ask Bin-ʾilima; look, ask aduwa; look, ask Yašuya!
Indeed, since the robbery of Šulum-Marduk I went to the aid of ʿAštartu when all the cities of the land of Garu became hostile, Udumu, Aduru, Araru, Mištu, Magdalu, ʿEnu-ʿanabi, Zarqu. The cities of Hayyanu and Yabišima were seized.
Something else: See, since you sent a tablet to me did I send a message to him. By the time you arrive from your journey, see, he will have reached Pihilu, and I will surely obey your commands.

The Land of Garu may compare to modern Golan/Bashan/Hauran-region. The name Golan may derive from Garu with the -r and -l being interchangable. The cities that follow may then be spread in this region. Udumu, Aduru, Araru, Mištu, Magdalu, ʿEnu-ʿanabi, Zarqu. A counterpart to Astartu in the Bashan region would have been modern Daraa.
Outside Garu were Hayyanu may be in Bashan south of the Ḥauran-plateau and Yabišima may perhaps be rendered as Yabesh/Yabish/Yabessa, being similar to Jabesh-Gilead south of the Yarmouk River.