"Mr. Nathaniel Hubbard and Mrs. Elizabeth Nellson were married by Mr. Frances Macamy (sp?) 23d August 1707"
(Source: Massachusetts, Town and Vital Records, 1620-1988, Braintree Records, p 721)
I am making an assumption that he is the John Hubbard who married Priscilla Bosworth; they were married at St. Michael's, which was the family's church. This couple had the births of two children recorded at Bristol, RI: Nathaniel 9 July 1748 and Eliza 22 June 1750.