Ymir fathered Thrudgelmir, as well as two humans, one man and one woman. What were their names?

Búri fathered Borr. Borr had three sons, Vili, Ve, and Odin, who killed the giant Ymir. In the vast flood of Ymir's blood, Þrúðgelmir was also drowned, although not before he had fathered Bergelmir. Bergelmir and his wife hid in a hollow tree trunk and survived. Odin and his brothers used Ymir's body to create the universe : they ground his flesh into dirt, and the maggots that appeared in his flesh became the dwarves that live under the earth. His bones became the mountains, and Odin strewed his brains into the sky to create the clouds. The universe comprises nine worlds, of which this earth (Midgard) is central.

They placed four dwarves: Norðri (North), Suðri (South), Austri (East), and Vestri (West) to hold up Ymir's skull and create the heavens. Then using sparks from Muspelheim, the gods created the sun, moon and stars. As Odin and two others (differing between the Poetic Edda and Prose Edda) walked along the beach, they found two pieces of driftwood. From these, they created the first human beings: