I was able to locate relevent records by using the surname plus the "&" sign with a location in the search field: casteel & prince georges
I was then able to find a 1733 tax record for Edmund Casteel.
Listed further down in the same paragraph of names was the above mentioned Jeremiah Perdue helping to confirm that I have the correct Edmund. You can also see that his other neighbor mentioned in the previous land record, Henry Darnell, is listed above.
This Edmund Casteel (II) had a son named Edmund (III) but did not deed land over to him until Dec.1742.
Edmund (III) had a daughter, Charity, who married a Perdew - shown in another Google Books find below.