"Columbia" single barrel shotguns were made by the W.H. Davenport Arms Company, Harrington & Richardson Arms Company and the Hopkins & Allen Company.
The Columbia double barrel shotgun was made by Simonis, Janssen & Dumoulin who were Belgium gun makers from 1884 to 1905 were sold by Henry C. Squires (there is some discussion on the years but they only vary by a year or so)