Your John Francis Tester and my great-grandfather, William Harry Tester were brothers. Their parents were John Tester born ca 1818 and Ellender (Nellie) Danner born ca 1820. John Francis was born Feb 14,1850 in Watauga Co, NC and in 1870 he married Virginia (Eliza) Moody. She was born Feb 1850 and died Nov 26, 1907. Her parents were Levi Moody (b. 1809) and Aurilda (Rildy) Baird (b. 1824).
This is all I have on John F and Eliza's children:
Julia A. b 1870, Susan A. b 1872, Mary Elizabeth b 1874, Nora C. b Apr 1877, John A. b Jul 1879, Henry G. b Dec 30,1881 and died Jan 15, 1969 in Banner Elk, NC, James O. b Jul 1883, William B. b Mar 21, 1887 and died Nov 1970 in Vilas, NC and Perl D. b Oct 1889. Some of these dates may be off since they were taken from Watauga County census. If you have more info on John F and Eliza Tester or Mary Elizabeth and James Raymond Harmon and would like to share it, contact me. My grandfather, John A. Tester, along with some of his brothers married Harmon girls. Hope this helps.