Adeline Hildreth married Silas D. Sanford in 1861, and they had at least two children. Although Adaline and Silas Sanford were together in 1870, it looks like they split, as Silas remarried in 1871. In 1877, Adeline Sanford married Aaron Hange, and the 1880 US Census shows her as Adeline Hange (no husband present), living with her mother and two Hange children (their birth name was Sanford). I don't know what happened to Aaron, and I can't find Adeline between 1880 and her death. When Adeline died in 1928, her Death Certificate showed her as Adeline Sanford, widow of Silas Sanford, and the informant was Ernest Sanford, one of her two Sanford children.
Normally, I would use Hange, her last known married name as her Current Last Name, but in this case, her last official record was under the last name Sanford. What should be Adeline's Current Last Name?