From BiblePortal Wikipedia

Hastings' Dictionary of the Bible [1]

ACCOS ( 1Ma 8:17 ). Grandfather of one of the envoys sent to Rome by Judas Maccabæus in b.c. 161. Accos represents the Heb. Hakkoz , the name of a priestly family (  1 Chronicles 24:10 ,   Ezra 2:61 ).

International Standard Bible Encyclopedia [2]

ak´os ( Ἁκχώς , Hakchṓs ): The grandfather of Eupolemus, whom Judas Maccabeus sent with others to Rome in 161 bc, to negotiate a "league of amity and confederacy" (1 Macc 8:17). The name occurs In the Old Testament as Hakkoz (הקּוץ , haḳḳoc ), who was a priest in the reign of David ( 1 Chronicles 24:10 ).

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [3]

( Ἀκκώς , prob. for Heb. Koz, i.e. Accoz, הִקּוֹוֹ  ; Vulg. Jacob), the father of John, and grandfather of the Eupolemus who was one of the ambassadors of Judas Maccabaeus to Rome ( 1 Maccabees 8:17).