Complex sentence: Snorri Thorfinnsson aka Snorri Guðriðsson, the son of Thorfinn Karlsefni and his wife Guđriđ, is thought to be the first white baby born in North America.
Split into simpler sentences: Snorri Thorfinnsson aka Snorri Guðriðsson, was the son of Thorfinn Karlsefni and his wife Guđriđ. He is thought to be the first European baby born in North America.