Birth:  About 1604   of, Sheffield, Yorkshire, England
geocities.com/Heartland/Acres/9660/fam00180.htm gives her name as Mary McKay Powell and year of birth as 1608. Neither Mary nor Thomas Prather were noted in the Feb. 1623 census of Virginia made after the Indian massacre, but John and Cathren Powell were, so there are some doubt and conflicting statements here. The unusual occurance of Smith as a middle name also raises questions as to whether a maternal ancestor was named Smith or there was some friendship with a Jonathan Smith, but Middle names seem to have quite uncommon until after 1800. In Virginia there was only a Jonathan Giles but in a different area, and about 20 Smiths, three of them John, although a Jonathan Smith may have perished in the massacre.
Marriages:
  Spouse:  (Pr10) Thomas Prather  Family
  Marriage:  About 1621   Of, Sheffield, Yorkshire, England

Thomas Prather and Mary McKay had issue:

(Pr9-1)  John Prather 1629 - c 1664 d. Rappahannock Co. or Norfolk Co., VA
(Pr9) Jonathan Smith Prather
(Pr9-3) William Prater, 1632  Ensign who returned to England.
(Pr9-4) Samuel Preather
(Pr9-5) Richard Prater b. about 1635 d. Rappahannock Co. or Norfolk Co.,VA
(Pr9-6) John Prater b. unknown
The number of boys raises the question of whether the girls are simply not included.