Yastrow or Jastrow, Germany?

I have a distant relative that is from Yastrow or Jastrow, Germany back in the late 1800's. I cannot find a Yastrow in Germany.

Another person told me Yastrow is in Czechoslovakia, near Prague. I can't find it in Czech. either.

None of the cities in Czech start with the letter "Y" so it must be spelled differently.

Anyone have any suggestions?

thanks

allen Krueger

Canby, Minnesota, USA