Motz - Tschiedel names

I am after information about the Motz – Tschiedel names, from around Northern Bohemia, Zittau areas. Places of interest are Ketten (Chotyne), Grottau (Hradek nad Nisou), Reichenberg (Liberec) in the Czech Republic and Zittau in Germany which borders on the Czech Republic.

Particular interst is Rudolf Motz from (Ketten – Grottau) and died in Zittau. And of Tschiedel name from Grottau, especially the marriage of Anna Motz and Emil Tschiedel in 1923 and all died during WWII.