I swear by Ancestry.com. Using it I found your relatives in about 5 minutes. I then searched the Coup family forum for Levi and Torrence Coup (Levi was Torrence Coup/Koup's father)and found the following post. It would appear that you are part of this group.
Good luck - Ty Coup
Torrence, born May 26, 1864, died, 1935, his wife, Carrie?, born 1867, died 1936, in Northumberland County, pa. Their children: Norman, Aug 1885, Arthur, Aug 1890, Walter L, 1894, Homer, 1889, Oscar, Jan 3, 1897, Harry (your grandfather), 1904, Lee, 1915, Nellie, Mar 1892 and Edith 1908. Any info on any of the this family, I have info to share with this line. The parents of Torrence were Levi and Catherine Knecht Coup/Koup