Jeremiah Killey (p. 45) m. Rebecca Braley and had a daughter Abigail b. Barnstable, 26 Oct 1759. No marriage or death date is given for Abigail, and there is no expanded entry for her (on p. 85, she could come just before Luke). However, she makes some sense as Levi and Abigail Killey ended up living in Barnstable, and she is an appropriate age.
Jeremiah Killey (p. 39) m. Temperance Downs and is given one child, called Jeremiah by Randall, but in reality Asa, b. 1782. The father is said to have died by 1761 but that has been shown to be in error, and there is nearly 30 years between his marriage in 1753 and Asa's birth in 1782 to have a child named Abigail (hopefully earlier to be closer to Levi's age). As only one birth is recorded in Barnstable for this family, it could be this family lived elsewhere prior to 1782, say Chatham.
More research is necessary, but the first case seems more likely.
