I have recently found Henry Seaver, William Seaver, Jacob Seaver and George Crobarger on the Botetourt Co, VA personal property tax lists (PPTL) in the 1790s.
There was a William Severs on the Botetourt Co. 1783-1789, who then disappears. In 1794 William Severs and Henry Severs begin to appear on the lists. Spellings included Seaver, Seavers, Severs, Seevers 1790-1805. William appeared 1794-1805, after which he disappeared. Henry appeared on the lists 1794-1797. Jacob Seevers appeared only one year, 1796, and was enumerated on the same date as George Crowbarger. George Crowbarger was enumerated on the same date as Henry Sever in 1795.
I believe that Jacob Seaver perhaps married Esther Crobarger about 1795 and they all moved to Hawkins Co, TN shortly thereafter. Jacob also bought and sold land in bordering Sullivan Co, TN and eventually settled in the part of Washington Co, VA that became Scott Co, VA in 1814. Washington/Scott Co. VA borders Hawkins Co, TN and Sullivan Co, TN.
William Seaver(s) was married twice. The youngest child by wife #1 (name unknown) was born in 1805. The last year that William Seaver was on the Botetourt Co. PPTL was 1805 (I searched the lists through 1810). In 1809 William Seaver was on the Hawkins Co, TN list. He married Margaret Peggy Cleek/Click there about 1807 or 1808. William Seaver d. about 1814, and a guardian's record for his son, Joseph, links him to Jacob Seaver, who was the security for guardian, Michael Dechard (Deckert) to the tune of $4,400, which must have been a rather substantial sum for that era.
I will be happy to send my transcriptions of the tax lists to anyone who wants them.