In 1949 her brother Frank died. He has listed surviving sister Viola Syous. Could this be Lyons? Her sister's name was misspelt in same obit.
William Clair Lyons & Viola Mumma were married on 18 December 1924.
(Source: Fulton County News, McConnellsburg, PA; 1 January 1925)
Father:David R. MUMMA (b. 1 AUG 1843, Harrisonville, Licking Creek twp, Fulton Co., PA - d. 27 JUL 1927, Broad Twp., Bedford Co., PA) Mother:Eva "Eve" CLEVENGER (b. 28 SEP 1845 - d. 1 MAR 1898)