What is the name of the first human being in Norse mythology?

The first human being in Norse mythology is Ask, also known as Askur. According to the myth, he was created by the gods Odin, Hœnir, and Loki. They shaped him out of an ash tree (also called Ask in Old Norse), hence his name. Along with Embla, the first woman, Ask became the progenitor of the human race in Norse mythology.