I found a reference in an early 1900s story in the News-Tribune about pioneer attorneys in the area. One was "Michael Bright (father of Moccasin Mike)"

That's the only reference I could find. The Brights lived in West Duluth.

The son referred to might have been a Junior, for there are lots of references to another prominent attorney named "Michael Bright" around the turn of the century. They had a lot of land holdings in the Superior area, so maybe ...

Here's more on the Bright father the paper referred to:

Michael Steele Bright born January 6, 1830, in Madison, Indiana. Died November 4, 1868, on the Ohio River. Degrees, A. B. and A. M. Occupation, studied law with his father, Senator Michael S. Bright, and practiced law till 1854. Position, was for some time Judge in County Court, Superior, Wisconsin. In 1862 moved to Chicago. In 1863 moved to New York City and established the banking house of Bright & Co. Mr. Bright met his death in a collision of steamers on the Ohio River, between Cincinnati and Madison, in his exertion to save others. An eloquent eulogy was pronounced before the Gold-board of New York, by Dr. T. A. Hoyt.

Michael Steele Bright, who lost his life by trying to save the lives of others in the memorable conflagration of the steamers United States and America, which burned on the Ohio river in December, 1868.