Reasonably certain she's not related but you can check? Point your mouse at "Search" in the header bar on ancestry.com. Scroll to "Public Member Trees" then click. Enter Dorothy Joan Hill as the person you are researching born 1916 Colorado. Click "Search" and that'll retrieve several family trees. Some identify her parents as John Edwin Hill and Dorothy Ida Critchell. Lorena not included as a sibling and that indicates they were not the parents you seek. Returning to your comments about the orphanage, I believe Lorena had a brother Urban born 7 Feb 1909. That's based on 1910 CO-Weld-Greeley-District 270-Image 7 showing Mary G. Hill(24), Lorena(4), and Urban(1). Urban was also placed in the State Home for Children and he's found 1920 CO-Denver-Denver-District 37-Image 10 (Lorena and Dorothy found Image 7). Urban died 11 Dec 1996 in San Bernardino, CA thus another avenue for research. Do you know why they were placed with the state? Mary was enumerated as divorced in 1910 and I wonder where the father resided? Comments on Urban written before I read your prior response.