So they're not really related, other than that they're two groups in the fertile crescent. Different places, time periods, etc. A follow up question about the Samaritans that I hope you can answer.

What were Sumerians also known as?

The Sumerians called themselves “the black headed people” and their land, in cuneiform script, was simply “the land” or “the land of the black headed people”and, in the biblical Book of Genesis, Sumer is known as Shinar.

Who are the Samaritans descended from?

According to Biblical tradition, the Israelites were divided into 12 tribes and the Israelite Samaritans say they are descended from three of them: Menasseh, Ephraim and Levi. After the Exodus from Egypt and 40 years of wandering, Joshua led the people of Israel to Mount Gerizim.