Dr. James Levi Isbell probably had to secure an intermarriage bond because he was marrying his brother's stepdaughter. He was son of James Richardson Isbell and Nicey Jane Willis, grandson of Levi Isbell and Sarah Birdwell Isbell, and his brother Albert C. Isbell married Sarah Jane White's mother, Faitha White.
Sarah J. White (b. Feb. 1869) is listed in the 1870 census as one-year-old in the household of Daniel and Olive White, along with their daughter 21-year-old Faitha White.Some say Sarah J. was Faitha's daughter while one researcher on the internet lists her as Faitha's younger sister.In the 1880 census,11-year-old Sarah White was listed as "stepdaughter" of Albert C. Isbell & Faithey E. (White) Isbell;three other White children in their household, Nancy 8, Martha 4, and James 3, are all listed as "daughter" and "son" (not stepdaughter or stepson) of the head of household, though their mother is apparently the Caroline White, 31, widow, listed as "sister-in-law."It could be that Caroline b.c1849 was the widow of one of Faitha's brothers (and these other White children were hers), but there's the slight possibility also that she could also be Faitha's sister Caroline (born c1836 per the 1850 census); the ages all fluctuate in the censuses, though 13 years seems a bit of a stretch.
Faith/Faitha/Faithey White b.1849/52 married 10 AUG 1871 in Marshall Co., Alabama to Albert C. Isbell, son of James Richardson Isbell and Nicey Jane Willis; grandson of Levi Isbell and Sarah Birdwell Isbell. Some read the marriage license as saying "Fartha White." Elsewhere, I've seen Faith/Faitha/Faithey's parents shown as Daniel P. White and Olive Turnbull or Olive Gray. One reference says Daniel Parks White.