House of Isildur
The House of Isildur were the descendants of Isildur, elder son of Elendil. The House came close to destruction at the beginning of the Third Age, when Isildur and his three eldest sons were lost at the Disaster of the Gladden Fields. His youngest son Valandil was kept safe in Rivendell, however, and from him came the line of the Kings of Arnor that led over three thousand years to Aragorn II Elessar.
 The Family Tree of the House of Isildur
Showing the descendants of Isildur. All information in the tree is from The Lord of the Rings, Appendix A, "The Northern Line: Heirs of Isildur", or "Eriador, Arnor, and the Heirs of Isildur", or "The Tale of Aragorn and Arwen", or The Peoples of Middle-Earth, "The Heirs of Elendil" unless otherwise specified. The figures after the names are those of birth and death where recorded (a single figure preceded by a 'b.' indicates a birth date). A dagger symbol, '†' signifies those who did not die of old age. A name preceded by: '***' indicates a King of Arnor and Gondor, '**' indicates a King of Arnor alone, and '*' indicates a King of Arthedain. A vertical dashed line indicates a line of descent with some members missing.
 The Realm of Arnor
Elendil and his two sons, Isildur and Anárion founded the two Númenórean realms in exile: Arnor and Gondor. Elendil was the High King of all of the Dúnedain but the rule of the southern kingdom of Gondor was delegated to joint ruled under his sons. After the War of the Last Alliance of Elves and Men both Elendil and Anárion were dead, so Isildur became the new High King. When he left Gondor to take up his kingship in Arnor he delegated rule of Gondor to Anárion’s son, Meneldil. However, Isildur and his first three sons perished in the Disaster of the Gladden Fields. From that time forward the two realms were sundered, with the Kings of Gondor descending from the House of Anárion and the Kings of Arnor descending from the House of Isildur.
 Realm of Arnor Notes
- ↑ Elendil and Gil-galad died when they fought and cast down Sauron.
- ↑ Isildur died escaping from the Disaster of the Gladden Fields.
- ↑ Anárion was slain during the Siege of Barad-dûr.
- ↑ Elendur died at the Battle of the Gladden Fields.
- ↑ Aratan died at the Battle of the Gladden Fields.
- ↑ Ciryon died at the Battle of the Gladden Fields.
 The Realm of Arthedain
Due to dissention among the sons of King Eärendur, the realm of Arnor was divided in three. The eldest son, Amlaith, became the first King of Arthedain and his descendants maintained the line of Isildur while that line died out in the other two kingdoms.
 Realm of Arthedain Notes
- ↑ Argeleb I was slain in battle with Rhudaur and Angmar.
- ↑ Aveleg I was slain defending Weathertop, which had been surrounded by a host from Angmar.
- ↑ Arvedui drowned in the Icebay of Forochel.
 The Chieftains of the Dúnedain
After the destruction of Arthedain by the attacks of Angmar the heirs of Isildur ceased to be kings. Instead, they continued as chieftains of the remnant of the northern Dúnedain until Aragorn II was crowned as King Elessar of the Reunited Kingdom.
 Chieftains Notes
- ↑ Aragorn I was slain by wolves in eastern Eriador.
- ↑ Arador was slain by trolls in the mountains north of Imladris.
- ↑ Descendant of a younger branch of Arathorn I.
- ↑ Arathorn II was killed by an orc-arrow that pierced his eye.
- ↑ 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", "Eriador, Arnor, and the Heirs of Isildur"
- ↑ 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.), The Peoples of Middle-earth, "The Heirs of Elendil"