[Ger-Poland-Volhynia] Help from the experts!

[Beth Burke]

In a written account of my grandmother's early years and immigration, she
often referred to the city of Dubechna (spelled phoenetically).  I believe
it might be around/near Lublin, but I don't know for sure.  

I am researching the names Friedrich (Gustav), Lieske, Glor and Zellmer.
The first two surnames are from my mother's side and the second two are from
my father's side.  Oddly enough, records that I have all seem to indicate
that they came from the same general area around Lublin.  I don't have any
evidence that they knew each other, but after immigration to the USA (and
some to Alberta, CA) they eventually ended up in northeastern Wisconsin.  

Any information that all of you - the experts - might have or if you can
point me in any new directions - would truly be appreciated.

Beth Burke
Verona, WI