Elmer Scott Derr was a farmer who lived in the Ballenger district of Frederick County, Maryland with his wife, Daisie. He was born in Feagville, Maryland on June 21, 1877 and died in 1965. His parents were Rugus and Sarah Derr, also from Maryland.
The Derrs had three children, two sons and a daughter: Carl, John, and Myrtle.
His ancestors were from Schifferstadt, Germany.