Genealogy / Genealogy of Lecrenski (or Leczenski) - grandmother Gazda [9]

Thank you for the info on my name search. Now I am really confused, where do I start? On the 1930 census his name was spelled Lecrenski, I know he was born around 1876 and some records say Austria some Poland. He and his wife only spoke Polish, far as I know never was naturalized, never was able to find how he or his wife even came over here. I know they changed surnames and were probably Americanized when they got here just to make it easier for the kids at school. I thought I remember a Leczenski on the mailbox and it is spelled that way on the 1910 census also, but I remember a Leczenski or Lecyenski or somesuch on the mailbox. Give me your best shot as to where to start. Thanks