Adopted in 1979 by Michael and Arcadia McGuire, my Polish name was Justyna or Anna

Okay here it goes I only know this my polish name was justina or Anna I was born in laczyca (£ęczyca?) Poland I believe and adopted in Warsaw Poland. My adopted parents came from NYC for the adoption. Their names are Michael and Arcadia McGuire. I was in an orphanage along with my adopted brother who was believed to have been months apart. I was born 1977 but adopted 1979 I have no clue as to my real birthday due to nobody knew it. I'm so desperate to find someone I am related to by blood. My adopted parents are truly amazing but my mom passed away 5to yrs ago from cancer and I'd like to find my mom biology that is to find my family history.

Reach me at jmcguirea at aol. Com

If you are sure about £ęczyca, maybe try to contact the hospital where you might be born.
Check the website: zozleczyca.pl
It would be extremely hard to find someone just by a name - yet you're not sure if your Polish name was Justyna or Anna (maybe both?)

But write an email, it's possible that someone give you some clue, further search direction.
I hope you'll reach someone from your Polish family.