Talmai

King of Geshur, on the borders of Palestine and Syria. David married Maacha his daughter, the mother of Tamar and Absalom. The latter avenged the wrongs of his sister Tamar by the murder of Amnon, and then took refuge at the court of his grandfather, where he remained three years, 2 Samuel 3:3,13,14.

Source: ATS Bible Dictionary
Talmai

Abounding in furrows. One of the Anakim of Hebron, who were slain by the men of Judah under Caleb (Numbers 13:22; Joshua 15:14; Judges 1:10).

A king of Geshur, to whom Absalom fled after he had put Amnon to death (2 Samuel 3:3; 13:37). His daughter, Maachah, was one of David's wives, and the mother of Absalom (1 Chronicles 3:2).

Source: Easton's Bible Dictionary
Talmai

(bold ). One of the three sons of "the Anak" who were slain by the men of Judah. (Numbers 13:22; Joshua 15:14; Judges 1:10) (B.C. 1450.) Son of Ammihud king of Geshur. (2 Samuel 3:3; 13:37; 1 Chronicles 3:2) He was probably a petty chieftain, dependent on David. (B.C. 1040.)

Source: Smith's Bible Dictionary