The Belden last name was standardized by most of the family from Belding to Belden. Rev. Joshua Belden convinced the family to settle on Belden about 1772 at the request of Col. Elisha Williams, Wethersfield Town Clerk per History of Ancient Wethersfield Connecticut ... vol. 2 pg 75.
Also, the Barbour Collection lists her as the daughter of Josiah & Mabell Belden b. 19 June 1716 (found on Find My Past). She is the second daughter named Rebecca. Her sister only lived 7 days. Josiah m. Mabell Wright, d. Sergt. Samuel Wright, May 1, 1707, by Rev. Stephen Mix (Barbour Collection accessed Find My Past)