Tar-Atanamir becomes King of Númenor
Meaning: The Jewel of Mankind
Event Type: Political
Age: 2nd Age - Rings
He is listed as Tar-Atanamir the Great.
"Much is said of this King in the Annals, such as now survive the Downfall. For he was like his father proud and greedy of wealth, and the Númenóreans in his service exacted heavy tribute from the men of the coasts of Middle-earth. In his time the Shadow fell upon Númenor; and the King, and those that followed his lore, spoke openly against the ban of the Valar, and their hearts were turned against the Valar and the Eldar; but wisdom they still kept, and they feared the Lords of the West, and did not defy them."
Unfinished Tales, Part 2, Ch III, The Line of Elros: Kings of Numenor
There is a date discrepancy here, with UT giving the date as 2029, while Appendix B of RotK gives the date of accession as: "2251 Tar-Atanamir takes the sceptre. Rebellion and division of the Númenoreans begins."
In note 10 of The Line of Elros: Kings of Numenor, Christopher Tolkien indicates that 2251 should be the correct date of death, not accession, and that App B should read: "2251 Death of Tar-Atanamir. Tar-Ancalimon takes the sceptre. Rebellion and division of the Númenoreans begins." He points out that this is supported by the Akallabêth where is said that the division began in the time of Tar-Ancalimon.