If you would like to expand on your yLineage, this is the place to do it. Let others know if your GGG Grandfather had brothers and sisters, but don't forget to post that on the DNA Test Participants Needed forum. The more places you let everyone know your lineage, the better chances someone will find it in an internet search.
John Morris Perry, M.D., md. Ethel A. Phillips in 1903
CLASS OF 1902 (194 LIVING, 28 DEAD)
JOHN MORRIS PERRY
Phys. and Surg.; M.D.; b. Mr 29, 1877; s. Morris (b. F 28, 1825, O.) and Mary A. (Girdner) Perry (b. Mr 1, 1836, Knox Co., Ky.). Prepared in Princeton, (Mo.) H.S. and Kirksville (Mo.) Norm. Sch. Located in Princeton, Mo. Mayor of City, 1913-14. 1st Lt., later Capt., M.C., U.S.A.; with A.E.F., O 4, 1917-My 29, 1919. Mem., Mercer Co. Med. Soc. (Pres. 1914-15); Mercer Lodge, A.F.A.M. (Worthy Master, 1907-1908); Princeton Lodge, 191, K.P. (C.C., 1908-09). Married Ethel A. Phillips, S 30, 1903. Child, Mildred Jane, b. O 22, 1906. Address, Princeton, Mo.
Source: The Alumni Record, of the University of Illinois College of Medicine Alumni, Chicago Departments: Colleges of Medicine and Dentistry, School of pharmacy, published by the University of Illinois, 1921; Pg. 90