Son of Arvin Baker (1804 - 11 Apr 1879) and Jerusha Crowell (Baker) Baker (2 Apr 1814 - 1 Aug 1885). He married Nov 1872 Harriett M. Beckwith the daughter of Elishai M. Beckwith. 1860 US census lists him as manufacturing or selling "sewing machines, stitchers". Died of consumption.
The Nantucket Historical Association's Historic Image Database and Barney Genealogical Record has an image of Franklin T. Baker.