Forgot to mention. This Peter Duncan(b.1633) was a son of an earlier Peter Duncan who is said to have married into the Stone and Key family ... Here's why I mention
From previous post to this site:Col. John Stone, who settled in Leedstown. "(He) had a son, Francis, who married Mrs. Mary Kay, widow of James Kay, of Richmond County, and daughter of Thomas Pannell."
This Col John Stone lived at one time in Hungars Parish of Accomack Co, Va.(later Maryland) Peter Duncan first arrived in this county in 1650, and was transported by a Stephen Charlton (mentioned in records with this John Stone).
The Son, Francis Stone, mentioned above,who married Mary Pannell Key Stone, was living in the Bull Run & Occaquen River area of Pr W Co Va, and had land adjoining a John & Elizabeth Duncan there. This John Duncan died in 1739, but believe he is connected to the Peter Duncan family too.