William H. Gleason (born c. 1848) was a Canadian-born American blacksmith from Laingsburg, Michigan.

Gleason was born in Canada. His parents were James Dagg Gleeson and Margaret Gleeson (Dobie). He married Emma Treat sometime before 1870 and they had two children, Jennie Gleason (born c. 1870) and Frederick Treat Gleason (born c. 1872).

Sources

1. 1870 United States Federal Census; Name: Wm H Gleason; Age in 1870: 23; Birth Year: abt 1847; Birthplace: Canada; Home in 1870: Sciota, Shiawassee, Michigan; Race: White; Gender: Male; Post Office: Laingsburg.
2. 1880 United States Federal Census; Name: William H. Gleason; Age: 32; Birth Year: abt 1848; Birthplace: Canada; Home in 1880: Laingsburg, Shiawassee, Michigan; Race: White; Gender: Male; Relation to Head of House: Self (Head); Marital Status: Married; Spouse's Name: Emma Gleason; Father's Birthplace: Scotland; Mother's Birthplace: Scotland; Occupation: Blacksmith.
3. Selected U.S. Federal Census Non-Population Schedules, 1850-1880; Name: William H Gleason; Location: Laingsburg, Shiawassee, Michigan; Enumeration Date: 31 May 1880; Schedule Type: Industry.

This Gleason / Gleeson line appears to be consistent with recent Y-DNA and mitochondrial DNA matches. The GLEESON spelling of the surname appears to be the correct spelling in Ireland and the GLEASON spelling of the surname appears to have been an American (U.S.A.) creation.