Dennis, I have only been able to locate one child for Thomas Gambill and Sushey Brewer:
Family Data Collection - Births Record
about John Gambrel
Name: Gambrel, John
Father: Brewer , Sushey
Mother: Gambill , Thomas
Birth Date: 1781
City: Wilkes Co
Country: Colony North Carolina
This is the info I have on John:
.JOHN GAMBILL5 GAMBREL(THOMAS4 GAMBILL )1,1,1 was born 1781 in Wilkes County, North Carolina, and died 17 Aug 1858 in Harlan County, Kentucky.He married (1) ELEANOR NELLIE MARKLE1, daughter of JOHN MARKLE and ELIZABETH JACK.She was born 1801 in South Huntington, Westmoreland, Pa, and died in Pittsburg, Pa.He married (2) ELLEN SHELTON1.He married (3) ELIZABETH MILLER1 18 Apr 1841 in Knox, KY, USA1.She was born 1805 in KY, USA1, and died 1870 in Bell, KY, USA1.
Children of JOHN GAMBREL and ELEANOR MARKLE are:
i. DRUCILLA6 GAMBREL.
ii. SUSAN GAMBREL, m. MITCHELL NIASLEY.
2. iii. ISHAM GAMBREL, (my gr gr grandpa) b. 1805, Clay County, Kentucky; d. 10 Dec1896, Kedmore, Kentucky.
3. iv. FRANKLIN GAMBREL, b. 1812, Kentucky.
v. MARTIN GAMBREL, b. 1813, Kentucky.
vi. WILLIAM GAMBILL, b. 1814.
vii. THOMAS GORDAN GAMBREL, b. 1816, Knox County, Kentucky; d. 15 Oct 1885, Washington CO, AR.
viii. HARLAN GAMBREL, b. 1825, Kentucky.
4. ix. GARRETT GAMBREL, b. 1826, Knox, KY, USA; d. 1889.
x. ESTHER GAMBREL, b. 1830.
xi. DANIEL KING GAMBREL, b. 1833.
Children of JOHN GAMBREL and ELIZABETH MILLER are:
xii. MARTIN6 GAMBREL, b. 1813, Knox County, Kentucky.
xiii. GORDON GAMBREL, b. 1816, Knox County, Kentucky.
xiv. THOMAS GAMBILL, b. 1844, Knox County, Kentucky.
xv. MARTHA GAMBILL, b. 12 Mar 1846, Harlan, Kentucky.
Hope this helps you.