** I am not related.
Could you be searching in the wrong state? I don't know if this will help, but the 1880 census shows the family in Arkansas and that Laban was born in Arkansas.
Source Citation: Year: 1880
Census Place: Franklin, Marion, Arkansas; Roll: 51
Family History Film: 1254051; Page: 15A; Enumeration District: 207
Jonathan Knight, 30, b. TN, parents b. TN
America Knight, 26, b. TN, parents b. TN
Levi Knight, 6, b. MO
Laban Knight, 2, b. ARK
You may already have this information. According to several family trees at ancestry, Laban's parents died in Arkansas, but I can't find anything about Laban.
Jonathan Knight
Birth 22 Mar 1847 in White, Tennessee, USA
Death 1895 in Lead Hill, Boone, Arkansas, USA
America Waterman
Birth 1854 in Bledsoe, Tennessee, USA
Death 1897 in Dodd City, Marion, Arkansas, USA
Laban's siblings:
Jonathan Knight
1847 – 1895
Levi Elesse Knight
1874 – 1962
Laban Knight
1878 –
Sarah Nettie Knight
1883 – 1916
Garlie Jane Knight
1888 – 1945