Brown Driver Briggs

 Tamar = "palm-tree"
n pr f
1. widow of Er, the son of Judah; fiancee of Shelah, another son of
Judah; wife of Judah and mother of Pharez and Zerah
2. daughter of David by Maacah, sister of Absalom, and rape victim of
Amnon her half brother, another son of David
3. daughter of Absalom
n pr loc
4. a place on the southern border of Gad