I am looking for relatives of Wilhelm Hartmann born in Steinhude Hannover Germany on June 25, 1863. and Sophie nee Mueller Hartmann. Sophie was born in Bergen on the Dumme, Germany Jan 27,1859. Last address I have for them (from 1922) is 31 Gunnistr Hannover(may not be the name of the street now). They had 6 children, Willie born 1888,Fritz born 1898, Charlotte born 1892, Henrich (Henry) born 1900, Louise born 1902 and Martha no birthdate.Willie & Fritz were in WWI (Fritz died in the war) and Henrich in WWII. Heinrich and Charlotte came to the United States in 1900 & 1902 respectfully. Heinrich's last address was HannoverLinden Gumistrasse 37Germany.That address is now 37 Wilhelm Blulm Strasse Hannover.I believe Louise married but do not know her married name.Any help will be appreciated.