The concept of gods and deities dates back to ancient times, and it's challenging to pinpoint the absolute oldest god known to humanity, as it predates recorded history. Various cultures have worshipped different gods throughout human history, and the oldest gods may have been localized to specific regions and predate written records.
One of the earliest recorded examples of gods comes from the Sumerian civilization, which existed in Mesopotamia around 4,000 to 3,100 BCE. The Sumerians had a pantheon of deities, such as Anu (god of the heavens), Enlil (god of wind and storms), and Inanna (goddess of love and war). These ancient gods were significant in the development of early religious beliefs and mythology.
Likewise, ancient Egyptian civilization, which emerged around 3,100 BCE, had a rich pantheon of gods, including Ra (god of the sun), Osiris (god of the afterlife), and Isis (goddess of magic and motherhood). The worship of these gods dates back to the early dynastic periods of ancient Egypt.
It's important to note that these are just a few examples, and various other cultures around the world developed their own pantheons of gods throughout history. The oldest god known to humanity likely goes back much further than recorded history allows us to trace accurately. Our knowledge of early religious beliefs is limited by the availability of archaeological evidence and ancient texts. As such, it's challenging to definitively identify the oldest god or gods known to humanity.