In Sumerian mythology Ningursu's father was the storm god Enlil, so that is likely the connection. That said many of these deities shifted names and roles over the two thousand years or so that they were actively worshipped, and often took on different meanings in different places at different times.

The gods had a lot of overlap in responsibilities; it was not at all like a Dungeons & Dragons pantheon where every deity had a set and specific set of duties and powers. Gods could be as broad and seemingly universal as Enlil (god of storms) or Inanna (goddess of love and war), or they could have very narrow associations, like Enbilulu, god of irrigation. Some gods were servants or family members of other gods, like Ninshubur, Inanna's personal servant/vizier.

Some gods lost their original identity and became syncretized with another deity, like Asaruludu, who was originally the city of Kuara's patron deity but later became merely one of the fifty names of Marduk, patron god of the city of Babylon.

The religion of Sumeria and Mesopotamia is fascinating and deep. I just got interested in it myself when I started building a D&D campaign set in the ancient bronze age. I went down that rabbit hole and still haven't crawled out of it.

Ancient polytheistic religions didn't really work the way movies, pop culture, video games, and fantasy has keyed us to understand them. For a really in-depth overview of how ancient polytheism worked I'd highly recommend A Collection of Unmitigated Pedantry: Practical Polytheism, a blog by a professional historian.