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

William UFFNER Spouse: Mary STROUP Marriage: 04 Nov 1860, Highland, Ohio Source: Marriage Records, 1805-1953. Ohio. Probate Court (Highland County)

2.  1850 Census Index/Images (online at Ancestry.com; Image #25 of 25 — William is indexed "Ujerer"):  White Oak Twp., Highland Co., OH, Roll M432_694, p. 328A, 511/511, enumerated 21 Sep 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):¤-

Elizabeth Rader	75	F		Farmer	1000	Va
William Ufner	50	M				"

Listed two households from William's future wife, Mary STROUP (æ 34, b. VA), who is still unmarried and living with her parents.

3.  1860 Census Index/Images (online at Genealogy.com, Image #23 of 25):  Taylorsville P.O., White Oak Twp., Highland Co., OH, Roll 987 (Book 1), p. 327B, PN 116, 848/786, enumerated 2 Jul 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):¤-

William Huffner

62

M

Farmer

2700

700

O

Listed two household from William's future wife, Mary STROUP (æ 46, b. VA), who is still unmarried and living with her parents.

4.  1870 Census Index/Images (online at Genealogy.com, Image #11 of 28 — Mary is indexed "Heffner"):  Nevin P.O., White Oak Twp., Highland Co., OH, Roll 1222 (Book 1), p. 367A, PN 11, 78/78, enumerated 21 Jun 1870, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):¤•

Huffner Mary	50	F	W	Keeping house	1800	250	Ohio
Wilkin William	18	M	W	Farm hand			Ohio
Stroop Annie	80	F	W	Invalid			Virginia

Annie is Mary's mother.  William is likely a nephew.

5.  1880 Census (indexed at FamilySearch.org; page image online at Ancestry.com, Image #24 of 29):  White Oak Twp., Highland Co., OH, Roll T9-1033 (Book 1), p. 550D, PN 24, SD 4, ED 56, enumerated 22/23 Jun 1880, official enumeration date 1 Jun 1880 (extracted by Diana Gale Matthiesen):¤•

1880:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).
1	2	3	4	5	6	11	13	24	25	26
192	199	Uffner Mary	W	F	65	/	Keeping House	Va	Va	Va

Listed next to William WILKINS (æ 29, b. OH, wife Frances).