I'm afraid I do not know the identity of John's parents, but I have pulled his census records.He and Eliza are in the 1850 census ofMontgomery Co., OH, and in the 1860, 1870, and 1880 censuses of Preble Co., OH.Based on these censuses, their children were:
1.Mary Catharine STROUP, b. ca. 1848 2.Amanda "Manda" STROUP, b. 1849 3.Henry STROUP, b. ca. 1852 4.Rosetta STROUP, b. ca. 1853 5.John Oliver STROUP, b. ca. 1855 6.Oscar STROUP, b. ca. 1856 7.Philip W. STROUP, b. ca. 1859 8.Minna / Minnie A. STROUP, b. ca. 1863
All were born in Ohio, except for John, Eliza, and eldest daughter, Mary Catharine, who were born in Pennsylvania.For further details, please see their family group sheet on my web site:
This is a toughy.Not only is John *the* most common male given name for STROUPs, Pennsylvania has the most STRAUB/STROUP families of any state in the Union.(STROUP is an Anglicized spelling of the German surname, STRAUB.)To make matters worse, in the censuses, we do not find any other STROUPs living near John to give us a clue as to his kin.Unless you "luck out" and someone who knows this family gets interested in their genealogy and makes an appearance online, your prospects of identifying John's parents are not good.However...
If you can find a living male STROUP who descends from John on a patrilineal (direct male) line, you should at least be able to connect John with his STROUP family in Pennsylvania via DNA testing.There is a STRAUB/STROUP DNA project in progress: