This David, at age 16 on 17 Sept 1756, chose his "uncle" Samuel Remington to be his guardian. Apparently this "uncle" was the brother of his mother's first husband, Thomas Remington. (Source: "Sabin-Remington-Hunt Notes" by Gordon L. Remington, in The New England Historical and Genealogical Register, Oct. 1993, p. 372)
[S012741] Gordon L. Remington, Sabin-Remington-Hunt Notes, in "The New England Historical and Genealogical Register", (Vol. CXLVII, October 1993, No. 588), 376.
[S012613] James N. Arnold's Vital Record of RI, East Providence -- Marriages, Seekonk Marriages, p. 580.