Angmar is at the north end of the
Misty Mountains. I believe at its maximum it was on both sides of the
mountains, and might have been associated with the
Orcs’ takeover of
Mount Gundabad, a place of considerable importance to the
Dwarves as it was supposed to be the place where
Durin the Deathless first awoke. The
map shows it primarily in the northwest of the Misty Mountains north of
Rivendell and Rhudaur, the eastern breakaway daughter kingdom of
Arnor.
Tolkien does not tell us who the
Witch-king was before he became a
Nazgûl. We do know that three of the
Ringwraiths were
Númenóreans. We also know that the second most powerful
Ringwraith was called
Khamûl the Black
Easterling, the only one for whom we have a name, so that Ringwraith wasn’t a
Númenórean.
For myself, I believe the Witch-king was a Númenórean prince, a contemporary of Tar-Ciryatan, twelfth
king of Númenor, and his son Tar-Atanamir, who rejected an ambassador of the
Valar and refused to lay down his life. I wrote an essay on this,
Origins of the Nazgûl and the Downfall of Númenor.
Other people have other theories, but mine is that this prince was a close relative of Tar-Ciryatan’s, his advisor, and quite possibly (likely, in my view) the first viceroy of
Umbar,
Númenor’s principle colony and most important military base in
Middle-earth. His apparent long life and considerable persuasive skills (as a result of his
Ring of Power) strongly influenced Tar-Ciryatan and corrupted Tar-Atanamir. If he was in the order of succession to the crown of Númenor, then he might have been motivated by jealousy of the
kings, offering
Sauron a weakness toward his downfall.
The Witch-king was almost without doubt a good person in his beginning:
Gandalf tells
Frodo,
sooner or later – later, if he is strong or well-meaning to begin with, but neither strength nor good purpose will last – sooner or later the dark power will devour him.
And if
Glorfindel returned to Middle-earth in the
Second Age to help in the war against Sauron, it is quite possible that both Glorfindel and
Elrond knew him personally before his fall, making Glorfindel’s prophecy about his end all the more poignant.