I found more than one possibility for a Will Whitten in the Brockton area. One was William H. Whitten, twice previously married, who became the third husband of Priscilla Elizabeth (Lucas) Haynes on November 20, 1907 at Brockton, Massachusetts.
William was born at Bowdoin, Maine, in May of 1856, the son of William and Emeline (Sheppard) Whitten. Priscilla Elizabeth, who also went by Elizabeth P., was born July 1, 1866 at Plymouth, Massachusetts, the daughter of Abner B. Lucas and Sarah R. (Raymond) Lucas. William H. Whitten may be the William H. Whitten, who's shown in Massachusetts Death Records as dying at Brockton, Massachusetts, in 1934.
There was also a William A. Whitten, born about August 1873 in Maine, who married Elizabeth Sherlock in 1892. William was the son of William and Jennie (Thair, Thayer, Phair or ?). Elizabeth was born in Massachusetts about 1871, the daughter of Daniel and May (Donahue) Sherlock. William and Elizabeth lived at Hanson, Massachusetts, and Abingdon, Massachusetts, not far from Brockton.
If you have corrections and/or additions to the information above, or another theory as to the identity of Will Whitten, please leave a comment or contact me directly.