I'm not sure of Sarah's maiden name:
MARRIAGE-CONFLICT: If Col Samuel Griffin died in 1703 this would eleminate my Sarah Griffin because she remarried in 1681 to John Blagdon. Most of what I know is from John Frederick Dorman's "Westmoreland Co VA Records". My notes asy Order Book A, 16 Oct 1681 and July 1681 - Sarah Griffin, now wife of John Blaggon. Also Order Book 4/30/1684 - Sarah Griffin, alias Blagdon, and 7/27/1681 Sarah Griffin, now Blagdon. COMMENT: There appears to be two Samuel Griffins, one dying before 1681 and the other dying in 1703. The later of Northumberland Co married Sarah, widow of Thomas Griffin, brother of Samuel. One dau, Katherine, b 16 Mar 1664. There is a lot of info in two articles.
Sarah 
