Jean Kelso was born in 1716 in Londonderry, Province of Ulster, Northern Ireland. [1, 6]
She arrived as a two-year-old in New England in 1718 with her parents Hugh Kelso, a wheelright, and Sara (Taylor) Kelso from Ireland (Bolton, page 102). 
The family relocated to Worcester, Worcester County, Province of Massachusetts in 1733 (Bolton, page 183). 
She married Matthew Gray Jr, in 1734 in Worcester. 
She passed away on 20 Dec 1764 in Worcester, Worcester County, Province of Massachusetts, in Colonial British America, and she's buried in the "Old Burial Ground On the Common" in Worcester, with stone number 127 which bears an inscription stating, "Here lyes [sic] the body of Jean Gray." [2, 6]
1. Ancestry.com details and primary source links 
2. OneWorldTree, vital statistics for Jean Gray, wfe of Matthew Gray. Ancestry.com database. 
3. Bolton, Ethel Stanwood. Immigrants to New England, 1700-1775. Salem, MA: Essex Institute, 1931. 235p. Reprinted by Genealogical Publishing Co., Baltimore, 1966. "U.S. and Canada, Passenger and Immigration Lists Index, 1500s-1900s." Ancestry.com database.
4. "Massachusetts, Wills and Probate Records, 1635-1991 for Hugh Kelso," Worcester Probate Records, Vol 1, 1731-1739, 1778-1814 and 1863-1870. Ancestry.com database, with original image of the will 
5. "Worcester, Massachusetts, Burial Index, 1727-1859." Ancestry.com database. 
6. “Town Birth Record in Worcester, MA,” Jane Gray and husband Matthew Gray Jr and children. Ancestry.com database, image of original record 
7. Jane Kelso Gray. FindaGrave.com 
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