Was Thos Johnson, his Will, Greene co GA, Book 4, brother to Margaret Johnson

There was a Thos Johnson, who died in Greene co GA, his Will is in Book 4, which covers 1817-1842. One who signed was Wm Greer, his daughter married into the Simontons.Was Thos Johnson a brother to Margaret Johnson who m. Adam A. Simonton?Anxious to learn about Margaret Johnson's ancestry.Thanks...