I am a LANDRETH researcher and have compiled a 557 page book, "Forebears and Descendants of Landreth Pioneers".
In my book I have a chapter on the LANDRETHS in Madison who left there in the early 1840s and went to AR and TX.
I have the following: "SEABORN J. LANDRETH b. AL 1830 m. 26 JAN 1868 MARY WOODARD in Newton Co AR. Was still single in 1860 and living with his mother in Red River Co TX. He was listed as a merchant".
I list only one child of Seaborn and Mary: John F. Landreth b. 1869 Newton Co AR. There were probably other children but my research on this family ended in 1869 and other children were probably born in the 1870s or later.
Seaborn was a son of THOMAS LANDRETH & HANNAH HOWARD. Thomas died in Madison Co AL about 1840 but his wife, Hannah, sometimes called Anna, took the children and went to AR then TX.
This might answer some questions about where the name SEABORN originated.