The son of John and Margaret Acheson. He was born in Drumadillar, Enniskillen District, County Fermanagh, Northern Ireland.

William married Christina Fallis on 3 Mar 1847 in Northern Ireland. Children they had together were named Edward, William George, John A., Mary Jane, James, Margaret Ann, Christina Ellen, Rachel, Catherine and Robert Gordon.

William was a farmer for nearly 60 years. He died of old age.

Obituary: The Dundalk Herald
Jan. 13, 1910
The Late William ACHESON ~
William Acheson, who died on New Year`s day, was born in the County Fermanagh, Ireland, Feb. 1st, 1921, and married to Christina Fallis on Feb. 28,1847, who died Jan. 15th 1907.
He left Ireland on April 14th, 1850, coming across in 28 days. He stayed at Madoc for some time, then came to Caledon where he lived 3 years.
In 1853 he settled on lot 205, 2nd range, Artemesia. Some years later he moved to the farm now owned by Mr. Aaron Jordan at Inistioge. While here he gave his heart to God and joined the Methodist Church at Inistioge, of which he has since been a member. He loved his Bible and death had no terrors for him.
In 1863 he moved to Lot 205, 3rd range, Proton, where he resided until his decease.
He was a strong man both mentally and physically and enjoyed almost unbroken health up to the last. Death came naturally from old age.
Of a family of 11 children, four sons and four daughters survive, namely: Wm. G., John and James on adjacent farms and Robert on the homestead.; Mrs. J. Duncan, Mrs. Edgar Duncan, Mrs. Jas. McMillen settled on neighboring farms and Mrs. Geo. Hutchinson at Kimberley.
Interment took place at the Bethel cemetery on Jan. 3rd where an impressive service was conducted by Revs. T. Laidlaw, of Inistioge, and J. J. Ferguson of Dundalk. Those who attended from a distance were: Mr. and Mrs. John Agnew and Mr. and Mrs. Wm. Fawcett, of Alliston; Mr. Geo. Rutherford and Miss Elitha, of Shelburne, Mr. Gilles...bottom torn off