Searching for Leo Wittie's parents and/or siblings - Rita at Caro Library helped find his obituary for me.
Leo’s obituary is found in the Tuscola County Advertiser, published on December 8, 1939:
Leo Henry Wittie died Thursday, November 30, at a Detroit hospital after two months illness. Funeral services were held Sunday, December 3, at Huson's Funeral Home with Rev. A. F. Runkel officiating and burial was made in Caro Cemetery. Mr. Wittie was born Dec. 8, 1903 at Hamler, Ohio and when a young man moved to Owosso. He had been employed the past few years as an electric welder in Detroit.
About six years ago he married Anna Riley, daughter of Mr. and Mrs. Orlo Riley of Caro, who with a daughter survives. Mr. Wittie is also survived by a daughter, Jean of a former marriage who lives in Georgia and four brothers and four sisters, who live in Defiance and Toledo, O., Grand Rapids and Owosso.