August Braun/Anna Rasal

Hi I am looking for information on August Braun and his wife Anna Rasal. I need there parents and so forth. I know they were born in Germany 1839 & 1854.And i also know that two of there children Richard George Braun and Elizabeth Welhelmine Braun were born in Steffin, Nordwestmecklenburg, Mecklenburg-Vorpommern, Germany1874and 1876 any help would be very nice . thank you