Hylas, Menominee County: a station on a branch of the Chicago & Northwestern Railroad, four miles east of Hardwood, in 1884; see Dryads for the name. (GSM 1885)
--Michigan Place Names, Walter Romig, publisher, Grosse Point Michigan, 1905
Hylas, Menominee County, Michigan. This name was taken from a dictionary of mythology. Hyla is the specific name of the "tree frog" or "tree toad" and that also was thought of when the station was named.
--A history of the origin of the place names connected with the Chicago & North Western and Chicago, St. Paul, Minneapolis & Omaha railways .. Stennett. William H., Chicago, 1908
Michigan Gazetteer and Business Directory Floodwood, Foster City, Granite Bluff, Hardwood, Hylas