"The youngest of five sisters and two brothers, Uilleam MacCoinnich (William MacKenzie) was born in 1857 in Shader, on the peninsula of Point on the Isle of Lewis. Like his father and grandfather before him, Uilleam built a house on the croft and there, as a crofter and fisherman, raised his own family. However, following the emigration of his surviving sons and the death of his wife, Uilleam was forced to emigrate to Canada where he settled in Fort William, Ontario, and where he died in 1908. The sorrow of this departure and his awareness that he was never again to see his beloved Isle, sparked in Uilleam a profound sense of loss that he turned toward the creation of laments and other verse of immense power and beauty."

from

https://www.folkmusic.net/htmfiles/inart536.htm

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https://www.geni.com/people/William-Mackenzie/6000000097729450836

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Was he married and was his wife's name Mary?? If so, he died in 1908.