I am searching for Bollenhagen family members. My Great-great grandfather was born in Hanover Germany in 1849 and came to America in the 1880's. He had two daughters (Henrietta and Elizabeth) and died in San Francisco on August 6, 1908. He was married to Hilma Obrink.
Anyone who knows how to contact a Bollenhagen family member in Germany and could advise me how to do that would be of a great help.