Wealthy N Newcomb 1797-1841, Ct & RI

A reader wrote:

My great grandmother was Laura Delacy Lillibridge Dingley, d/o Wealthy N Newcomb and Kenyon L Lillibridge. We have Laura's marriage certificate to William Henry Dingley 25 Apr 1853, Providence, RI. We  are unable to locate Wealthy or her parents. She is buried in the Israel Angell Cemetery, Johnston, RI  1841. Her parents are posted on the grave stone as Amos Nucumb and Delase.

With so many potential leads, and extensive research, Wealthy and her parents remain elusive. Bearse shows a Wealthy N Newcomb 1779 but married to the wrong husband (Ketchum). Any information would be so much appreciated.

Lynn