The following may be their son:
.  Thomas STROPE (Sr.), b. 1760-65 
Among other things, Thomas named a daughter, "Amelia."

1.  Marriage Record:

2.  LDS.  Family Search: Internet Genealogy Service:  IGI - International Genealogical Index (online at FamilySearch.org).

Johannes or Big John Stropes Christening: 19 Nov 1738, Ref Dutch Church, Katsbaan, Ulster, New York Father: Johannes Heinrich Strope; Mother: Maria Catharina Spiekerman Source: patron submission

3.  1790 Census Index/Images (online at Ancestry.com; Image #12 of 13; extracted by Diana Gale Matthiesen):¤•

1790

PA

Luzerne [now Bradford] Co.

p. 154

Ln. 1

Strope John

2-0-4-0-0

These data indicate:

Gender and Type	Age Class	Therefore Born	Individuals Inferred
2 free white males	16 or over	in or bef. 1774	= John (b. 1738) = ?
4 free white females	all ages	in or bef. 1790	= Margaretha (b. ca. 1740s) = Amelia? = Maria? = Elizabeth?

Also in Luzerne County (list was alphabetized):  Henry STROPE and John's brother, Sebastian STROPE and his wife, Lydia VAN VALKENBURG. 

4.  1800 Census Index/Images (online at Ancestry.com; Image #7 of 7; extracted by Diana Gale Matthiesen):¤•

1800

PA

Luzerne [now Bradford] Co.

Wysocks Twp.

p. 414

Ln. 10

Sebastian Strope

01201-00002-00

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	10-15	1784-1790	=
2 males	16-25	1774-1784	=
1 male	45 or over	in or bef. 1755	= Sebastian (b. 1744)
2 females	45 or over	in or bef. 1755	= Lydia (b. 1738) = Margaret (b. ca. 1740s)

Our subject's widow, Margaret (VAN VALKENBURG) STROPE, is the sister of Lydia (VAN VALKENBURG) STROPE, wife of our subject's brother, Sebastian STROPE.  Margaret appears to be living with Sebastian & Lydia in the 1800 census (in part because she isn't anywhere else!). 

5.  1810 Census Index/Images (online at Ancestry.com; Image #3 of 3 — indexed "Strape"; extracted by Diana Gale Matthiesen):¤•

1810

PA

Luzerne [now Bradford] Co.

Wysox Twp.

p. 137

Ln. 10

Strope Margaret

00100-00001

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	16-25	1784-1794	=
1 female	45 or over	in or bef. 1765	= Margaret (b. ca. 1740s)

Listed six lines below Margaret's widowed sister, Lydia (VAN VALKENBURG) STROPE, who is living with her son, Henry STROPE. 

6.  1820 Census Index/Images (online at Ancestry.com; Image #1 of 5; extracted by Diana Gale Matthiesen):

1820

PA

Bradford Co.

Wysox Twp.

p. 116A

Ln. 30

Margrate Strope

000000-10001-Agriculture

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 female	9 or under	1810-1820	=
1 female	45 or over	in or bef. 1775	= Margaret (b. ca. 1740s)
-	person(s) engaged in agriculture

.  Archives of the STRAUB-L mailing list (online at RootsWeb.com).

.  WorldConnect / Ancestry World Trees (online at RootsWeb.com/Ancestry.com).