Here is my Theory
In Ancient times Punjab was known as the Madra Kingdom in west the Capital was Sagala which is modern day Sialkot this is why the Greeks wanted to capture because it was the Epic center of Punjab the Kingdom of Madra was founded by Madra who was the son Shibi and Aswapati was the grandson of King Shibi Aswapati's wife was from a minor tribe known as Malava. She was known as Malavi there was a region known as Malava / western Malla by Indo-Aryans they were a people from southern Punjab including today's Multan city (Mallorum Metropolis) and region, south of the confluence of the Jhelum ,Hydaspes for the Greeks, and Ravi,Hydraotes for the Greeks, rivers they are mentioned by ancient Greek historians in the Mallian Campaign of Alexander III of Macedon (Iskandar); Malada
You might have heard some Punjabis call them Malwa jatts definitely have link to this region
King Shibi was son of Ushinara is believed to be from the Anu race which is also known as Annunaki and no they were not Gods or descendants of Race of Gods that's what the google searches will tell you
Or the hindu texts but I do believe some text of the stories but not the god parts because we know there is only One creator of everything he doesn't have any children's or partners as we believe that there was hundred and twenty four thousand prophets were sent to all nations but people use to change the texts or use to take some prophets as gods just like we see it in the modern day
Ushinara since he is believed to be from the Anu Race which we know existed in the Ancient Sumer
Also known as Sumerian which was located in Mesopotamia modern day Iraq some the hindu text also date back to the same time as the sumerian and ancient Babylon times I do believe some Punjabis are descendants of Ancient sumerians linked by Ushinara
Sumerian farmers grew an abundance of grain and other crops, the surplus from which enabled them to form urban settlements. And we know Jatts like farming
The Sumerians referred to their land as
Kengir, the 'Country of the noble lords' (
𒆠𒂗𒄀,
k-en-gi(-r), lit. 'country' + 'lords' + 'noble') as seen in their inscriptions.
A recent (2013) genetic analysis of four ancient Mesopotamian skeletal DNA samples suggests an association of the Sumerians with Indus Valley Civilization, possibly as a result of ancient Indus-Mesopotamia
since we know Indus civilization, also called Indus valley civilization or Harappan civilization,
earliest known urban culture of the south asian subcontinent just like Sumerians are known as the earliest civilization in Mesopotamia so without a doubt I believe they had connection with each other
As we all know from the Quran all Human race started from the Adam from one person as this
This connection between the Punjabis and Sumerians is very old in my opinion not all Punjabis though since this sub continent is big and was connected so they got mixed up with other tribes also