Dark Knight Name Generator

Something that pairs a plain knightly name with a grim surname or epithet: Ser Aldric Blackmere, Dame Isolde Nightvale, Sir Ulric the Grim, Lord Varen Duskhollow. If the character is meant to be mysterious, use a descriptive title instead, such as the Black Knight of Carrow Moor or the Knight of Broken Oaths, and reveal the real name later.

Malory and the French romances have several: Sir Breunor le Noir (the Black), Sir Turquine of the Dolorous Tower, Sir Meliagrant of Gorre, Sir Garlon the Invisible, Sir Bruce Sans Pitie, Sir Carados and, of course, Mordred. A few are included here for reference alongside original names built the same way.

Yes. The Ser and Dame entries fit an Oathbreaker paladin or a D&D death knight, the epithet names (the Hollow Knight of Saint Vesper, the Cinder Knight of Volmark) read like Souls bosses, and the Germanic and Slavic entries (Ulrich Ashfell, Dmitri Mrakovich) suit Warhammer or grimdark settings. Shorten to a surname or single word if a game enforces a character limit.

Usually yes, because the title is the point: it tells the reader this person was sworn to something and broke or outlived it. Sir and Dame are the standard English forms, Ser is the fantasy variant popularised by A Song of Ice and Fire, and Lord, Castellan or Knight-Captain imply rank beyond knighthood. Drop the title in dialogue once the character has been introduced.