The William F. Junkin, Jr. you are searching for who died in Montreat, NC in 1988 was my father. He was an ordained Presbyterian Pastor, and missionary to China and Taiwan 1940-1981.
The Junkin tree for his line of Junkins may be found at http://www.frontierfamilies.net/family/junkin/family/tree.ht...
(Joseph Junkin I; Joseph Junkin II; George Junkin; Ebenezer Dickey Junkin; William Francis Junkin, Sr.; Williams Francis Junkin, Jr.
Williams F. Junkin, Jr. was not a doctor. He was married to Jessie Woodrow McElroy. She died in 2006. Their children: Williams F.III; Alice (me), Jeanette, and Sarah.