Dwayne, The only Isaac that I can find in my files that comes close is one born to Abraham Colglazier,JR.
Family Number: 112-122 Name: Abraham Colglazier, JR. Born: March 2, 1832 Washington Township, Washington Co., IN Died: September 13, 1914 Buried: Married: Caroline TrinkleJuly 11, 1853 Washington Co., IN Born: April 29, 1836 Washington Twp, Washington Co., IN Died: January 27, 1893 Buried: Dtr of:What happened to her parents??prior to 1850.
Children:112-122-1 - Mitchell( June 7, 1858- March 5, 1929)m. Laura Alice Chastain Nov. 22, 1878 112-122-2 - Frankm. Susan Norris 112-122-3 - Abraham III m. ?? 112-122-4 - Luellam. William Markland(son Wilbur m. a Voyles.) 112-122-5 - Newlinm. Carrie Gardner 112-122-6 - Isaacm. 1st Voyles, 2nd Luella Marshall
I guess unless he would have been married to Essie Wilson he would not fit.Looks like this Isaac came along about ten years too early.I would like to know if you find him.Isaac is not one of those common names for this family tree.