1850 census of Floyd Co., Virginia, enumerated 5 July, lists on p. 442 as family #869/899:
Sarah Quesenberry, 45; Frederick, 21; Sarah, 20; Patsy, 17; George W., 15; Lucy V., 13; Martha B., 9; Owen, 5. All born in Carroll Co.

1860 census of Floyd Co., Virginia, lists as family #959:
Quesenberry, Sarah, 55, farmer; Frederick, 28; Sarah, 26; Mary, 24; Lucy, 21; Martha R., 19; Owen, 15; Enos, 9. All born in Va.

Frederick through Martha are children of Sarah and George. According to Elza Cox, Owen and Enos are children of the widow Sarah by Tobias L. Phillips. According to Barb Reininger, they are children of Sarah and George’s daughter Sarah (listed as 26 above, but as 20 in the 1850 census, which if accurate would make her about 30 in this year, and 15 when Owen was born.)

1870 census of Floyd Co., Virginia, Indian Valley & Burks Fork district, enumerated 27 Aug, lists on p. 29 as family #191/179:
Quesenberry, Sarah, 68; Lucy, 30; Owen, 21; Dicey, 16; Enos, 18. All born in Virginia.

Dicy is a daughter of George & Sarah’s daughter Mary.

1880 census of Floyd Co., Virginia, Indian Valley district, enumerated 7 June, lists on p. 15 as family #128/129:
Quesenberry, Sarah, 80; Disa, 22, granddaughter; Lacy, 1, son. All born Va/Va/Va.

Marriage in IGI, batch 8225101, sheet 47, file 0884877, as George Quesenberry to Sally Cox, 1 Feb 1820.

Family group of George Quesenberry & Sarah Cox, with only names and years of birth, from Eris Q. Wade. I suspect years may be approximated from census records.