Kondoł family search Poland 2. In Progress

My father was born in Poland in 1921 though I am finding it difficult to find older relatives with his surname. I can contact my cousins and their children though am looking to find out where the surname has come from (Kondoł). Also it would be good to find my fathers family line. I do know his father’s name was Marcin (or similar) Kondoł and his mother’s name was Antonina (nee Deren). I also know he had 2 older sisters and 4 older brothers with talk of 2 more brothers (first 2 born) who died in infancy. My grandmother (Antonina) died on 14th April 1967, born 1879? Also we have been told that my grandfather (Marcin) died the year my father was born though we now feel this may have been what the family has been told. I have years of birth etc for my father’s (Jozef Kondoł) brothers and sisters and their families it is the previous generations I am interested in. If you can point me in the direction of where to look I am happy to do some research myself but am finding it difficult. Thanks for reading and hopefully helping me.