Searching Tobias A Hansen b 1861

Searching for any information verifying Tobias A Hansen born 1860 or 1861 in Norway....he listed arendal as where he came from on his naturalization papers. Was married to Helmine Petrine Hansdatter from Tune Ostfold Norway. They Came to America in 1881 (as far as i can tell). Marrigae records or immigration records....anything that would verify his birth date, place, and or parents or siblings. His middle name is listed as Andrew on his naturalization papers.