Kings of Arnor
The Kings of Arnor were the rulers of the Northern kingdom of Arnor, located in Eriador. They were descended from Elendil and the Lords of Andúnië. The line would persist even after the fall of Arnor, and would eventually resurface at the end of the Third Age to retake the kingship of the North Kingdom.
Originally, Elendil was the High King of both Gondor and Arnor. After his death, he was followed by his son as Isildur, who retained the title of High King. His reign lasted only two years, however, and after his death the realm was split. Valandil his son claimed only the kingship of Arnor, leaving the kingship of Gondor to the house of Anárion.
After Eärendur the realm of Arnor was split between his three sons, founding the realms of Arthedain, Cardolan and Rhudaur. The elder line of Kings continued with the Kings of Arthedain. The royal line continued within Arthedain and faded in the other two nations. While they were of the same line, the kings of Arthedain are listed distinctly from those of Arnor.
In T.A. 1349, the descendants of Eärendur had died out in Cardolan and Rhudaur, and Argeleb I of Arthedain again claimed the title King of Arnor. However, the nation of Arnor at that time had long faded away, and Agreleb and his descendants were counted as kings of Arthedain in the lists of the Red Book of Westmarch.
Though the kings of Arnor faded, some folk maintained the faint belief that the kings would return, such as the Hobbits, who would retain the saying "until the king comes back" and also attributed their few rules and laws to the king as well. The memory of the northern kings would also not be forgotten in Gondor, where the line of kings had failed altogether.
In F.A. 1, the kings of the North returned in the figure of Aragorn II Elessar, who became king of Gondor and soon afterward re-established the realm of Arnor. He and his descendants afterwards would reign the Reunited Kingdom, but after Eldarion Elessar's son the Red Book records no more of the heirs of Elendil.
 Office and duties
The king of Arnor had similar powers and duties to those of the king of Gondor. The king would have control over the militaries of Arnor. He also had the ability to grant lands to others as fiefs or vassals. For instance, the Shire was originally a grant from the king to the hobbits. King Elessar would renew this grant upon his own accession to the throne, naming several officials of the Shire such as the Thain as a Counsellor of the North-kingdom.
The King would also have the legal right both to use a palantír and to appoint someone to do so in his stead. In the days of the split realm, Arthedain controlled the palantíri of Elostirion and Annúminas, while both Cardolan and Rhudaur contested the ownership of the palantír of Amon Sûl (later Weathertop).
There were several heirlooms the King would wear or use as signs of their authority. The most famous of these were the shards of Narsil, the broken sword of Elendil. Another was the Ring of Barahir, received from Finrod Felagund during the Elder Days by an ancient ancestor. The final heirloom was the Sceptre of Annúminas, a silver rod from the days of Numenor.
During the reign of Elessar, the Elendilmir was found in the tower of Orthanc, where it had ended up after Saruman stole the body of Isildur from the Gladden Fields. Elessar would wear the fillet on his brow when he was in the North kingdom
 List of Kings
|Kings of Arnor|
|1.||Elendil, son of Amandil||S.A. 3320 – S.A. 3441||Founded the realm|
|2.||Isildur||S.A. 3441 – T.A. 2||Last High King of the Realms in Exile|
|3.||Valandil||T.A. 2 – T.A. 249||First independent King of Arnor|
|4.||Eldacar||T.A. 249 – T.A. 339|
|5.||Arantar||T.A. 339 – T.A. 435|
|6.||Tarcil||T.A. 435 – T.A. 515|
|7.||Tarondor||T.A. 515 – T.A. 602|
|8.||Valandur||T.A. 602 – T.A. 652†||Cause of premature death not recorded|
|9.||Elendur||T.A. 652 – T.A. 777|
|10.||Eärendur||T.A. 777 – T.A. 861||last King of Arnor before the nation split|
|11.||Elessar||T.A. 3019 – Fo.A. 120||first High King of the Reunited Kingdom|
|12.||Eldarion||Fo.A. 120 – c. Fo.A. 220||Last king whose name appears in the Red Book.|
- ↑ 1.0 1.1 1.2 1.3 J.R.R. Tolkien, The Lord of the Rings, Appendix A, "The Númenorean Kings", "The Realms in Exile", "The Northern Line: Heirs of Isildur"
- ↑ J.R.R. Tolkien, The Lord of the Rings, Appendix A, "The Númenorean Kings", "The Realms in Exile"
- ↑ J.R.R. Tolkien, The Lord of the Rings, Appendix B, "Later Events Concerning the Members of the Fellowship of the Ring"
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), Unfinished Tales, "The Palantíri"
- ↑ J.R.R. Tolkien, The Lord of the Rings, Appendix A, "The Númenorean Kings", "The Tale of Aragorn and Arwen"
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), Unfinished Tales, "The Disaster of the Gladden Fields"