The Annanias Allen that went to North Carolina is my line .I descend from his son Gershom. The last I have for sure on Annanias is when he and his wife Hannah was selling land to his son Isaac in the 1770's. Te Annanias Allen you find in Burke/Caldwell North Carolina is Gershom Allen son. Gershom I know for sure had two brothers Isaac and Jonathon and he named a son Isaac. Gershom also had a son Squire whom Idescend from. Gershom had a daughter Ann that married a William Guest.
So I guess your Annanias born born 1742 grandfather William is a brother to my Annanias Allen that went to North Carolina. I have Annanias Allen father as Annanias and mother as Mary or Mercy. I have seen the pedigree further back but not been able to verify that information. I would like to discuss this family with you.