Ahimaaz in Smiths Bible Dictionary

(brother of anger). 1. Son of Zadok the high priest in David's reign, and celebrated for his swiftness of foot. During Absalom's rebellion he carried to David the important intelligence that Ahithophel had counselled an immediate attack upon David and his followers. 2Sa 15:24-37; 17:15-22 Shortly afterwards he was the first to bring to the king the good news of Absalom's defeat. 2Sa 18:19-33 (B.C. 972-956.) 2. Saul's wife's father. 1Sa 14:50 (B.C. before 1093.) 3. Solomon's son-in-law. 1Ki 4:15 (B.C. after 1014.)

Link: https://bible-history.com/smiths/A/Ahima-az/