Tammy:

Dora seems to descend from William, Sanford, & William BELT.

Ancestry free database of censuses (available free by Googling "1930 census"):

Madison Co., IN, 1930, BELT: William A., 47; Mae, 31; Evarista M., 1; Clarence N., 18; Myrtle R., 12; John S., 11; Dora E., 9; Paul S., 6; William R., 4.

Jennings Co., IN, 1920, BELT: William P., 35; May M., 20; Ellen R., 10; Clarence N., 8; Myrtle R., 3; John S., 2.

Decatur Co., IN, 1910, BELT:
William, 26; Estella M., 22; Ellen R., 1.
Sanford S., 52; Sarah E. {Sarah Ellen}, 47; Elnora M., 16; Simon L., 14; Clarence, 11; Clorena, 3.

Jennings Co., IN, 1900, BELT:
Sandford S., 42; Ella, 37; William, 16; Olive, 14; Viola, 11; Cora, 8; Nora, 6; Simon, 4; Dewey, 1. Rebecca, 66.

Jennings Co., IN, 1870, BELT
Basil, 36; Lucretia, 36; James M., 11; Sela, 2
Rebecca, 36; Sanford, 12; Mary, 10; Rebecca A., 8.

FamilySearch.org database of the 1880 Census, Columbia, Jennings Co., IN, BELT:

Rebeca J., 46, w, w, OH VA VA {Rebecca Jane SPAY, wid/o Wm.}
Ch. b. IN: Sanford, 22, IN IN OH; Mary, 20; Rebecca A., 18
Granddau. Maggie L. MILLER, 4, IN.
Bassil, 47, IN OH OH & wf. Lucresia, 47, IN VA NY
Ch. b. IN: James, 22; Selah, 12; Cora E., 8; Luella, 5.
Lucretia RAYBURN (30 Oct. 1833, Jennings Co., IN - 8 Sep. 1908, KS) m. 23 Je. 1857, Ripley, IN, Basil BELT, of Asa of John.
[[I'm still trying to sort out all of the Johns. I think this John BELT was of Warren/Butler Co., OH, before Ripley Co., IN, in 1820.]]

Ancestry, Jennings Co., 1860, BELT
Abrahan {sic, Abraham, s/o Asa}, 31; Sarah Ann, 29; Mary J., 6; Wm. H., 4; John W., 3; Nancy C., 6 mo.
Francis M., 22 {s/o Asa}
Hannah, 43; John L., 15; Henry B., 13; Albert G., 8; Manly A., 6; Asa G., 4.
William L., 35; Rebeckah J., 24; Zilpha, 5; Simon, 3; Malissa Jane, 4 mos.
{William Leonard BELT d. 10 Je. 1864, Brice's Crossroads, MS, Civil War.
Zilpha/Zelpha m1. 2 Aug. 1868, Jennings Co., (Wm.) Henry MILLER.
Sanford S. = Simon Sanford, b. 19/20 Dec. 1857, IN, bu. Union Cem., Greensburg, Decatur Co., IN, m. Sarah Ellen JORDAN.}

Microfilm of the censuses has more information than the online databases. Please verify.