Genealogy / William Alexander, 1850, Krunicza, Prussia, Poland [11]

I am trying to find my husbands great-grandfather. All I know is that he changed his name to William Alexander and that his naturalization record says he was born in Krunicza, Prussia, Poland on June 14, 1851 and that he sailed on the ship Elba from Bremen and arrived in Baltimore, Maryland, USA on Feb. 13, 1880. From there he came to a place called Bremond, Texas (a polish community) and married Mary Ann Paszkiet, whose parents (Michael & Josepha Paszkiet also came from Poland. He is buried in St. Mary's Cemetery in Bremond, Tx but the birthdate on his headstone says Feb. 14, 1850. Some of the records from St. Mary's Catholic Church are signed Valentin and/or Valentine Alexander and some are signed William Alexander. I'm told that polish parents oftened named a son born on Valentine's Day after St Valentine. I'm not polish, just an American with a mixed ancestry of english, scottish, welsh, german, dutch and spanish. I've found the polish sites to be very interesting and hope someone can help me. I want to know what his polish name is and I also want to know where he is from. I can't find Krunicza on the internet and wonder if he just put that down or if there is a Krunicza. Family legend is he came somewhere from Poland and changed his name and didn't tell anyone why or where he came from. Thank you for any help. Please email me at marthaabbott@comcast.net