Awesome information.
The origin from the Gilgamesh story has long been the most likely source of the biblical flood story. It makes the most sense and as you note, the connections are numerous as well as the many shared elements. Like the creation story, there is evidence that different versions of what was probably oral tradition were transcribed and fused into what ended up in the Bible.
Your information helps very much. My current knowledge is based around the story of George Smith who rediscovered the story of Gilgamesh in the 1870's. You have expanded my sources markedly here. Thanks again.
I'm glad that you have found the information useful.
I think a lot of people fail to understand, that the ancient Israelites from the kingdoms of Judah and Israel, were not isolated nations, because it was gateway between east (Babylonia, Assyria, Persia) and west (Egypt, Greece).
It really shouldn't be all that surprising the stories of Mesopotamia and Egypt might their ways in the Levant.
Even ancient Canaanite and Ugaritic deities found their ways into Egypt and Mesopotamia, during the Bronze Age. Goddesses, like Astarte and Anat were popular and worshipped in Egypt, during the Second Intermediate Period and the New Kingdom period.