Rebecca was mentioned (as Rebecker Newbuild) in the 24 November 1829 will of her father, Roger Shackelford, proved 21 December 1829. [Essex County, Virginia, Will Book 22, pages, 34–35.]

Sales of the estate of Mrs Rebecca Newbill were ordered recorded on 15 May 1837. [Essex County, Virginia, Will Book 24, pages 115–117.]

The estate of Rebecca Newbill in account with Orville Jeffries, administrator, from 1831 to 1836 was ordered recorded on 19 June 1837. [Essex County, Virginia, Will Book 24, pages 122–123.]