Elvira Parker Keith is the daughter of George Rason Keith and Sarah "Sallie" Darnell Keith.
On 17 Feb 1857, Elvira married Americus Green Lewellen, son of Richard J Lewellen and Christiana Catherine Bryce Lewellen, in Pike County, Missouri. They had two children: Mary Josephine and Richard A.
Elvira then married Mastin H Arthur on 26 May 1867 in Pike County, Missouri. They had one child, a daughter, Sarah Tippie. After Mastin Arthur's death in 1887, Elvira moved from Missouri to Salt Lake City, Utah to live with her daughter, Sarah and her family.