Genealogy / GRANDMA'S NAME WAS MITROS AND MARRIED OKULSKI [3]

My family came from extreme northeast Poland. I have relatives names up to the 1940's.
We are planning to go there next spring and would love to locate them.
But, any information on the name Mitros would be great. I found most of them came from Greece or Turkey. Am I part Greek!?!??!! Yikes!

Any info on traeling in Poland would be great, like things to see in Warsaw or Krakow. We are traveling on Eurorail and staying in economy level hotels. Any other VERY interesting places.

Any Mitros or Okulski's out there. They settled in Chicago.