George is of an age to be a grandson of the progenitor of the New York STROPEs, Johannes STRAUB.

Our subject may be the progenitor of the STROPEs/STROUPs across the river in New Castle Co., DE, which include:
.  Uriah STROPE / STROUP, b. ca. 1770

1.  Marriage Record:

2.  Census Index:  Colonial America, 1607-1789 (Broderbund CD-310):

1773 Tax List	NJ	Salem Co.	Elsinboro Twp.	p. 001	Strope, George
1774	NJ	Salem Co.	Elsinboro Twp.	p. 137	Strope, Goerge (sic)
1781 Tax List	NJ	Salem Co.	Lower Alloways Ck.	p. 001	Strope, George
1782	NJ	Salem Co.	Lower Alloways Ck.	p. 004	Strope, George
1782	NJ	Salem Co.	Lower Alloways Ck.	p. 005	Strope, George

There appear to be two George STROPEs by 1782 (father and son?).  There were no other STROPEs in NJ and none in DE on this CD.

3.  1790 Census:  the 1790 New Jersey (and Delaware) censuses were lost.

4.  1800 Census:  the 1800 New Jersey census was lost; not found in the Delaware census.

5.  1810 Census:  the 1810 New Jersey census was lost; the George STROPE in Delaware is too young to be our subject.

6.  1820 Census:  the 1820 New Jersey census was lost; the George STROPE in Delaware is too young to be our subject.

7.  1830 Census:  there are no STROPE/STROUP/etc. in New Jersey.

8.  William S. STRYKER.  1872.  Official Register of the Officers and Men of New Jersey in the Revolutionary War.  Trenton, NJ (republ. 1967ff by Genealogical Publ. Co., Baltimore, MD; Broderbund CD-518):

p. 293	STROPE, GEORGE.  Captain Gifford's company, Third Battalion, Second Establishment; also militia.
p. 772	STROPE, GEORGE.  Second Battalion, Salem; also State troops; also Continental Army.