John Tannatt Ussher, usually known as Johnny Ussher, was a settler, and Gold Commissioner in the Thompson Country of the Southern Interior of British Columbia, Canada in the 1870s. John Tannatt Ussher was the son of Samuel Ussher Esq., a lawyer in Montreal, and Harriet Rebecca Colclough. He was born October 17, 1830. Johnny Ussher married Annie Clara McIntosh, the youngest sister of his business partner James McIntosh, on October 21, 1878. Ussher Lake is named for him.