He is married to Alice van Doren.
They got married about 1900 at Hamilton, Butler County, Ohio.
Name: Orville Clifford Slifer, living at 1105 Huron Street, Toledo, Lucas County, Ohio; Age 40; Birth Date: 10 May 1878; Birthplace: USA; Race: White; salesman for W.H. Arnold co., Columbus, Ohio. Nearest relative: John Slifer of Slifer Packing Co., Hamilton, Ohio; Height: 5'6", Weight: 146 lbs; gray eyes, brown hair./ Washington, D.C.: NARA
Name: Orville Slifer, Death Date: 1 Nov 1943; City of Death: Toledo; County of Death: Lucas/ online database