my great grandmother (Auguste Marie Loos born Apr 26 1864) came from Makunischen, East Prussia. I do know is that there were many siblings who were still in East Prussia when Auguste Marie Loos and her older sister Lena Loos - Wolf came to the USA Lena and Auguste lived in Bloomfield NJ for a while. There was one sister whom my mom kept in constant contact with until appx 1964 Until then that she regularly sent and received both correspondence and packages from family in Germany and that they lived on "the other side of" the Berlin wall. The sister who lived in Berlin's name was Charlotte Loos - Olsen Auguste Loos - Lassiter was my mother's maternal grand mother. She married Hugh P Lassiter on 2/18/1886 I do have one a picture of her. It was taken in 1943 so she was 79 years old and passed the following year.
There was also a brother in the US - Otto Loos was born 1866 and was married to Minnie ??? Loos Minnie was born 1865. They had at least three children - Clara Loos born 1887 William Loos born 1883 Elsie Loos born 1882