I found an obit in my grandmother's collection for a D. D. Decker (DeForest Decker).
D. D. Decker Dies in Kansas City, Missouri:
South Dayton, (NY), Feb 16: De Forest D. Decker, fifty-four years old passed away in Kansas City, MO., February 10th from an attack of pericarditis followed by influenza. The remains arrived here Wednesday morning and the funeral was held Thursday from the Decker farm in Villenova with burial in Villenova Cemetery.

He is survived by his wife, two sons, George and Charlie, two daughters, Myrtle and Ruth. Mr. Decker was a member of Cherry Creek F & A. M. who had charge of the funeral.

I am not sure if this is part of your family, but I find it interesting that they share parts of an unique name.