Updated January 23, 2020 Share: How Popular Is The Name Hau Family name origins & meanings Vietnamese (Hâdotu;u) : unexplained.Chinese : variant of Hou.Chinese : variant of Hao.French (Gascony) : topographic name from a local form of Occitan fau ‘beech tree’ (from Latin fagus).South German : topographic name from Middle High German hou, a measure of woodland.