Coppersmith in Bohemia

After reading the the Nase Rodina I rec’d today, it gave me another idea of trying to find where my great-grandfather or great grandmother were from. My Great Grandfather, g.grandmother and grandfather came to the USA in 1891. My G.grandparents were approx. 30 yrs old. The passenger lists says they were coming from Zizan,Bohemia. My g.grandfather’s trade was listed as a coppersmith and my mother had told me that also. Does any one know much about where the coppersmith trade was most likely?? Maybe one area more than another? Their last name was Kdan.
thanks
Kathy