This document is about Amasai (son of Elkanah). For other homonyms, please refer to the Amasai document. He is the son of Elkanah (Elkanah of 1 Chronicles 6), and just as Elkanah's genealogy is complex, so is Amasai's.
1 Chronicles 6:25As for Elkanah, the sons of Elkanah: Zophai his son, Nahath his son,1 Chronicles 6:26Eliab his son, Jeroham his son, and Elkanah his son.1 Chronicles 6:27The sons of Samuel: the firstborn, Joel, and the second, Abijah.1 Chronicles 6:28The sons of Merari: Mahli, Libni his son, Shimei his son, Uzzah his son,1 Chronicles 6:29Shimea his son, Haggiah his son, Asaiah his son.1 Chronicles 6:30These are they whom David set over the service of song in Yahweh’s house, after the ark came to rest there.1 Chronicles 6:31They ministered with song before the tabernacle of the Tent of Meeting, until Solomon had built Yahweh’s house in Jerusalem. They performed the duties of their office according to their order.1 Chronicles 6:32These are those who served, and their sons. Of the sons of the Kohathites: Heman the singer, the son of Joel, the son of Samuel,1 Chronicles 6:33the son of Elkanah, the son of Jeroham, the son of Eliel, the son of Toah,1 Chronicles 6:34the son of Zuph, the son of Elkanah, the son of Mahath, the son of Amasai,1 Chronicles 6:35the son of Elkanah, the son of Joel, the son of Azariah, the son of Zephaniah,1 Chronicles 6:36the son of Tahath, the son of Assir, the son of Ebiasaph, the son of Korah,
2 Chronicles 29:12and of the sons of Elizaphan, Shimri and Jeuel; and of the sons of Asaph, Zechariah and Mattaniah;