I may have some ancestors that could be related to your John or Micajah.
They are Aaron Bennett (witness to a land survey 1793 Effington county Georgia,1804 land plat/warrent Bulloch county Georgia,1826 land grant from Ga. Governor,1820 Federal census Emanuel county Georgia).
His two sons ,John b 1800,and Benjamin L b 1802.
Any of this sound familiar.
Bill Bennett firstname.lastname@example.org