Several sources, including Savage, say that Abigail is the daughter of George Alexander & Susanna Sage(or Savage). He is a native of Stirling, Scotland & Susanna prob from Somerset, England. They married 18 Mar 1644 in Windsor, Hartford, CT. At least 7 children are attributed to this couple, John, an infant that died, Abigail, Mary, Daniel, Nathaniel, & Sarah. George left Windsor and removed to Northampton where he died in 1703.
"Genealogical Dictionary of the First Settlers of New England showing 3 Generations of those Who Came Before May 1692 on the Basis of Farmer's Register", by James Savage, published in 4 Volumes.