Some genealogies show this Robert as a son of Robert & Sarah Westgate of Warwick. However, there is a Warwick will for a Robert Westgate, Jr., who died Jan/Feb 1749/50. That individual is more likely to have have been the son of Robert & Sarah.
Robert & Patience had the following children named in his will and/or the will of his mother-in-law, Hannah Carr: Avis (m. 26 June 1745 William Smith b. 21 Feb 1715), Patience (m. Peleg Arnold), Sarah (m. Benjamin Watson), Hannah (m. James Aborn), & Mary.
The executor of his will was son-in-law Peleg Arnold.
[S012502] Alden G. Beaman, Ph. D., editor, RI Genealogical Register, Vol. 11, 209.
[S012741] Gordon L. Remington, Sabin-Remington-Hunt Notes, in "The New England Historical and Genealogical Register", (Vol. CXLVII, October 1993, No. 588), 374.