I am researching the Degroff family also. I don't have much but I have Frank's family as;
Philemon Degroff b:Abt 1806/07 Stueben Co NY d:Sept 4 1895 in Roscoe,Winnebago Co,IL. Married abt. 1828 Elizabeth Morse b:Abt.1809 in Stueben Co. NY.Their childrenare:
David b:Abt.1831 in Stueben Co. NY.Chester b:Abt. 1833 Stueben Co. Alexander W. b:Mar. 20 1835 Stuben Co. Frank (Francis) b:Aug. 3 1839 in Caledonia,Boone Co.,IL.Watson b:Abt.1843 in Manchester,Boone Co.,IL. Lorenzo b:Abt 1845 in Manchester,Boone Co.,IL. Eliza b:Abt. 1846 in Manchester,Boone,IL. Cordelia b:Abt. 1849/50 in Manchester,Boone,IL. Harry, Abner.Hope this helps you.