Sacar
Two men bear the name Sacar. The first is a Hararite remembered only as the father of one of David's mighty men; the second is a Korhite gatekeeper, fourth son of Obed-edom.
Sacar the Hararite, father of Ahiam
In the Chronicler's roster of David's elite warriors, one of the names is "Ahiam the son of Sacar the Hararite, Eliphal the son of Ur" (1Ch 11:35). Sacar himself is not counted among the mighty men; he appears only as the father of Ahiam.
The parallel list in 2 Samuel records the same warrior under a different patronymic: "the son of Shammah the Hararite, Ahiam the son of Sharar the Ararite" (2Sa 23:33). The Samuel form spells the name Sharar; the Chronicles form spells it Sacar. Both notices are otherwise framed identically — Ahiam, son, Hararite/Ararite — and the two spellings stand side by side as variant forms of the same patronymic.
Sacar the Korhite, son of Obed-edom
The second Sacar appears in the gatekeeper genealogy: "And Obed-edom had sons: Shemaiah the firstborn, Jehozabad the second, Joah the third, and Sacar the fourth, and Nethanel the fifth" (1Ch 26:4). He is one of eight sons listed for Obed-edom in the Korhite gatekeepers' line; nothing further is said of him beyond his place in the birth order.