Abigail ( is a female name occurring in Biblical narratives from the Books of Samuel, and reflected in the Books of Chronicles. The name Abigal occurs on one occasion, and is thought by the vast majority of scholars to be an alternate spelling of Abigail. There appear to be two individuals named Abigail:
The wife of Nabal, who became a wife of David after Nabal's sudden death (see Nabal). She became the mother of one of David's sons, who is named in the Book of Chronicles as Daniel, in the masoretic text of the Books of Samuel as Chileab, and in the Septuagint text of the Books of Samuel as Daluyah.2 Samuel 3:3, LXX
The mother of Amasa. In the Book of Chronicles, and Septuagint version of the Books of Samuel, Abigail's father is identified as being Jesse,2 Samuel 17:25, LXX and she therefore would be a sister of David, but in the masoretic text of the Books of Samuel her father is named Nahash; scholars think that Nahash is a typographic error here,Peake's commentary on the BibleJewis
Source:
http://en.wikipedia.org/wiki/Abigail