Zor-L of Krypton-2
From superman.nu: Supermanica
Zor-L (of Krypton-2)
The Kryptonian scientist who is the husband of Allura, and father of Kara Zor-L (known as Power Girl). Because Superman of Earth-2's father Jor-L was Zor-L's brother, Zor-L is therefore Superman's uncle. Both Zor-L and his wife were killed when Krypton-2 was destroyed (Showcase No. 97, Feb 1978).
(See also Zor-El)