Have you found a list of Josiah's children yet?
1850 Census - Chatham Co., North Carolina, Upper Regimental Dist., pg. 412 - household 908-909-
BLANCHET, Henry 19 b. NC Farmer
Blanchet, Narcissa 18 b. NC
SILER, Comfort 45 b. NC
Is this Josiah's widow? Henry "Wise Owl" Blanchard said to be NA. He and wife Narcissa migrated to Christian Co., Missouri by 1860. He died in the Civil War and she remarried twice #2 was Edmond Bridges and #3 Wilkinson Hunt. Her death cert avail MO Archives shows her b. Nov 1831 Chatham Co. - d. 16 Mar 1912 and maiden name as Narcissa Willfield Syler. No parents names were known by the informant.