1.  Anon.  1966.  Marriage Index:  Ohio, 1789-1850.  Liahona Research, Orem, UT (Broderbund CD-400):

Engler, Jacob	Stroup, Sarah	5 May 1812	Ross Co.
Angler, Jacob	Walter, Catharine	9 Jun 1825	Ross Co.

2.  Census Index:  U.S. Selected Counties, 1810 (Broderbund CD-313):  not found (disk contains Ross Co., OH, tax lists between 1810 and 1818).

3.  1820 Census Index/Images (online at Ancestry.com; Image #6 of 6 — indexed "Ruger" (the page is very hard to read); extracted by Diana Gale Matthiesen):¤•

1820

OH

Ross Co.

Green Twp.

p. 288

Ln. 21

Jacob Anger

100010-20010-0-100

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	9 or under	1810-1820	= Son A
1 male	26-44	1775-1794	= Jacob (b. 1788/9)
2 females	9 or under	1810-1820	= Rebecca (b. 1819) = Daughter A
1 female	26-44	1775-1794	= Sarah
1	person engaged in agriculture

4.  1830 Census Index and Digital Images (online at Ancestry.com; Image #15 of 20; extracted by Diana Gale Matthiesen):¤•

1830

OH

Ross Co.

Green Twp.

Roll 139

p. 285

Ln. 3

Jacob Angler

001 001 - 110 110

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	10-14	1815-1820	= Son A
1 male	30-39	1790-1800	= Jacob (b. 1788/90
1 female	4 or under	1825-1830	= Daughter C
1 female	5-9	1820-1825	= Daughter B
1 female	15-19	1810-1815	= Daughter A
1 female	20-29	1800-1810	= Ann Catharine

Where's Rebecca?  Sometimes, if a girl doesn't like her step-mother, she will move in with her grandparents.

5.  Census Index:  U.S. Selected Counties, 1840 (Broderbund CD-316):  not found.  Widow Catharine must be living with someone.

6.  Paul J. Midlam & Barbara Midlam.  1985.  Marion County, Ohio, Cemetery Inscriptions (online at Heritage Pursuit):

ENGLER, Jacob	d Jul 10 1840 Aged: 51y	Burtsfield [Cemetery]	Grand Prairie [Twp.]
ENGLER, Infant	d/o Jacob & Ann d Mar 20 1840	Burtsfield [Cemetery]	Grand Prairie [Twp.]
ENGLER, Joseph	s/o Jacob & Ann C. d Aug 20 1849 Aged: 19y 1m 7d	Burtsfield [Cemetery]	Grand Prairie [Twp.]
ENGLER, Catharine	d/o Jacob & Ann C.  d. Aug 29 1849 Aged: 13y 6d	Burtsfield [Cemetery]	Grand Prairie [Twp.]

7.  Birthdate calculated using Ben Buckner's JavaScript Birthday Calculator.

Name	Deathdate	Age at Death	Result
Joseph	20 Aug 1849	7d 1m 19y	13 Jul 1830
Catharine	29 Aug 1849	6d 0m 13y	23 Aug 1836
(Calculated birthdates should always be prefaced with "ca." — you can't be certain the person who calculated their age did it correctly.)

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