Mamie Adel McArthur was born on October 16, 1892 to parents James Oliver McArthur and Beulah Benton Pound. She had six siblings: Ivey Norton McArthur (1888-1891), James Oliver McArthur Jr (1895-1958), Ruth Marie McArthur (1898-1993), Chatherine Elizabeth McArthur (1902-1902), Bernice McArthur (1904-1984), and Edward Cecil McArthur (1906-1997).
Her father James Oliver McArthur was born on May 13, 1860 in Randolph, Georgia. He later resided in Urquharts, Early, Georgia, United States and on Decemer 8, 1887 married Beulah in Sumter, Georgia, USA. He worked as a farmer and raised his family in Sumter, Georgia, USA. He passed away on August 4, 1911 in Americus, Sumter, Georgia.
Her mother Beulah Benton Pound was born on September 26, 1870. in Sandersville, Washington County, Georgia and grew up in Riddleville, Washington, Georgia, United States. After marrying James in 1887, she lived in Sumter, Georgia, USA and raised her children. She passed away on April 27, 1959 in Americus, Sumter, Georgia, United States.