I am a descendant of the Hellstern family. Your Rosa L Hellstines, was born 2 Jan 1878. Her father Peter Hellstern, my gg grandfather. After my gg grandmother died in 1872 he married Charlotte (Lotte) Ebbert Kleingartner. I found them on the 1880 census in Cochecton Center, Sullivan County, New York. There was a Christine, age 10; Katie, age 8, and Rosa L, age 2. Christine and Katie although were listed as daughters of Peter, they were Kleingartners. Found them on 1870 census in Fremont Sullivan County New York. I believe Rosa Lena Hellstern married Edward Jarius Wormuth. I believe one of their offspring married an Ackerson as the 1940 census reflects a grandson living with them. Hope this sheds more light on your research.