Here's what Volume II of the 1906 book "History of Bedford and Somerset Counties Pennsylvania" has to say about Listie:
The obituary of Simon Krebs in the March 9, 1933 issue of the "Meyersdale Republican" newspaper indicates that Listie mine is named for Bedford County Attorney Humphrey Tate's daughter Listie. That means the town of Listie is related to the naming of the mine. The correspondent who identified the obituary reports that the Listie mining company was chartered on June 20, 1892. Another correspondent indicates that Listie used to be named Snyder's Mill, named after one of her Snyder ancestors. Snyder's grist mill is identified on the 1860 Walker map of Somerset County.