It is tempting to say she is the daughter of Jonh Jackson and Basheba Bean because they do have a daughter Mary Ann “Polly” born near the right time in North Carolina. But there is a marriage record for a Polly Jackson marrying Daniel Robbins 12/16/1843 in Randolph county, which is where the Jackson-Beans were living. Also, their Polly would have been born in 1821. Our Polly gives Guilford as her birth county in 1850 census and a birth year of 1816. So the county is off and the birth year is four years before the Bean-jackson wedding. Looks like there are two Polly Jackson’s and ours has parents other than John Jackson/Basheba Bean.

Find-a-Grave for Mary Wrenn who died 1889 is most likely Mary Heritage Wrenn m1854 to James Wrenn, with Mary Jackson Wrenn passing away after death of last child Mary (b1852) and James Wrenn’s marriage to Mary Heritage in 1854.