The Rings of Power are spoilers in this Lord of the Rings article.
The fathers of Elrond and Galadriel were made many times in episode 4 of The Rings of Power, but the reasons for their existence were a bit vague. So who exactly were they, and how are Elrond and Galadriel likely to feel about them by the end of the series?
Durin explains how his father sailed to Valinor and convinced the Valar to join the war and conquer Morgoth in the Great Wave. As a result, the Valar lifted him beyond the limits of this world and forever carried the evening star across the sky.
The Valar are Arda's powers, although Tolkien, being Roman Catholic, preferred to avoid using the term gods. The Maiar include Gandalf and the other Wizards, as well as Sauron and the Balrogs, all of whom were created to serve as their servants in Greek mythology.
Elrond's father's story is a fairly accurate, though brief, account of Tolkien's remarks about Earendil. The Silmarils, by contrast, are not mentioned in The Rings of Power because Amazon does not own the books.
Earendil is Elrond's father, and Aragorn's twin brother Elros (yes, Aragorn and Arwen are distantly related), so Elrond and Elros have both Elf and mortal ancestry on both sides. With the help of the Elf Cirdan the Shipwright, their father Earendil was known as the Mariner.
Earendil and Elwing were given the opportunity to choose whether they wanted to live as Elves or as mortals after they were given the opportunity. Of their sons, Elrond chose the Elves while Elros chose to become mortal. In The Return of the King, Arwen must choose between staying with Aragorn and becoming mortal.
In The Lord of the Rings, Bilbo sings a song about Earendil while the hobbits are staying at Rivendell, which puts it in the category of material from The Lord of the Rings, i.e. material Amazon is legally permitted to adapt. In the meantime, Elronds famous father is a burden to his shoulders, while his separation from his family as both parents are in Valinor and therefore unreachable.
Galadriel may be able to solve the issue since he will eventually marry her daughter. However, since Galadriel does not appear to have any children yet, and we haven't heard much of her husband Celeborn at this point, he may have to wait a while (in Tolkiens mythology, Galadriel and Celeborn are married but living separate at this point).
Galadriel is all Elf, and she is actually a grand-daughter of one of the very first Elves created in The Rings of Power, although she hasnt gone into any detail about what that means, probably because Finarfin is rarely mentioned in the Lord of the Rings' Appendices, which means Amazon doesn't have any rights to his story.
Finarfin, the father of Galadriels, was the younger half-brother of Feanor, King of the Noldorian Elves and the Elf who created the Silmarils and the palantiri (the seeing-stones seen in Both the Lord of the Rings and The Rings of Power). Feanor persuaded many Elves to go to war to restore them, and he and his followers refused to provide him with ships to ship to Middle-earth to kill them in
The Numenoreans may be implying that Galadriel is a Princess because to his mixed heritage; his father may have turned back and not taken part in the Kinslaying, yet he was still persuaded to wage a conflict against Morgoth.
The Lord of the Rings: The Rings of Power is now available on Amazon Prime Video.