1.  Allen L. Potts.  Marion County, Ohio, Probate Court Marriage Records, Vols. I-XII, 1824-1902 (online at Heritage Pursuit):

Crawford, Jacob

Miller, Julia Ann

9/10/1829

JP Michael Alspach

2.  1830

3.  1840

4.  1850 Census Index/Images (online at Ancestry.com; Image #20 of 24):  Waldo Twp., Marion Co., OH, p. 10B, 150/150, enumerated 10 Sep 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):

Jacob Crawford	44	M		Shoemaker	1600	Pa
Julia A	42	F				Pa
Rachel	16	F				O
Elmira	14	F				O
George	9	M				O
Mary	11	F				O
John	8	M				O
Percilla	6	F				O
Emeline	1	F				O
Lucinda Crawford	4	F				O
Frederick Stroub	15	M		Apr Shoemaker		Germany

Why is Lucinda listed last, with her surname?  Is she not their daughter?

5.  U.S. Census 1860 (extracted by Sharon Moore):  Ohio: Marion Co.: Waldo Twp.: p. 400:
Jacob Crawford 55 M Shoemaker Pa
Julia A. 53 F Pa
John 18 M Farmer Ohio
Lucinda 13 F Ohio
Emaline 11 F Ohio

6.  U.S. Census 1870 (extracted by Sharon Moore):  Ohio: Marion Co.: Waldo: p. 202:
Jacob Crawford 62 M Shoemaker ret. Pa
Julia A. 62 F Pa
Lydia Denman 16 F Ohio

7.  U.S. Census 1880 (extracted by Sharon Moore):  Ohio: Marion Co.: Waldo Twp.: p. 124:
Jacob Crawford* M 74 Mar Boot maker Pa Pa Pa
July A. F 72 Wife Mar Keeping house Pa Eng. NY
*insane and disabled

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

CRAWFORD, Jacob

d Jun 5 1881 Aged: 75y 9m 23d

Waldo [Cemetery]

Waldo [Twp.]