The online death certificates in the Missouri State Archives website list William Edward Phipps. In fact, I was just looking at his death certificate yesterday.He was born 9 Jun 1863 in Illinois, a son of Thomas J. Phipps and Katherine Hayes. He married Idabell Phipps who was still alive when he died. He died 29 Jan 1944 in Washington Township, Cedar County, Missouri. He was buried on the 30th in Mound Cemetery (location not stated) by a Stockton, Missouri undertaker.
I could not find a death certificate for Urban Ellsworth Phipps, but that names sounds familiar. I might have some info somewhere. Jennie would be difficult to find in death certificates, assuming she married.