I found this in Wikipedia.

Tyr (Old Norse: Týr or Tívar) is the god of warfare and battle in Norse mythology, portrayed as a one-handed man.

He was a son of either Odin or Hymir.

Corresponding names in other Germanic languages include Tyz (Gothic), Ty (Old Norwegian), Ti (Old Swedish), Tiw, Tiu or Tew (Old English) and Ziu (Old High German).

Origins:

The name Tyr meant "god" (cf. Hangatyr, the "hanged god" as one of Odin's names)

So, could Ziu be Odin or the son of Odin?