Mathisen/Peterson

I am looking for information on Johanna Henrichson and ? Peterson. My gr. gr. gr. grandmother is Petra Peterson. Her full name according to her son's social security application has Theodora Petra Peterson. She was born in Norway on March 1882. I don't know when she and her family came to the states. They lived in New Jersey because my gr. gr. grandfather was born there. She married a Jacob Mathisen/Mathison (come to find out the real last name starts with Tres) a relative has the name written down somewhere. Henry their son was born in New Jersey on December 24, 1899 in Jersey City, New Jersey, Jacob his father which is listed on Henry's birth certificate, apparently was a drinker and he left and me another woman and they had 12 children I think. He lived in Massillion, Ohio. I don't know anything else about Petra and Jacob. If anyone can help please let me know. Oh, Petra was born either in Moss or Oslo Norway.