Where did these surnames come from?

Question

Kachel and Kirchoff

Answer 1

http://www.houseofnames.com/xq/asp.fc/qx...

http://genforum.genealogy.com/kirchoff/

Answer 2

Kachel    

Last name origin & meaning:

German and Jewish (Ashkenazic): metonymic occupational name for a potter, from Middle High German kachel ‘pot’, ‘earthenware vessel’. The surname is common in the Alemannic and Swabian regions. The modern German sense ‘glazed tile’ is a fairly recent development, and probably has not contributed to the surname. Compare Euler, Hafner, and Töpfer (see Toepfer).

Kirchhof    

Last name origin & meaning:

German: variant spelling of Kirchhoff.