So I was looking around and found out that in the Lord of the Rings Trading Card Game the Nazgul actually all have names. Aside from the Witch-King and Khamul, their names are Quenya numbers. So they are Nelya (three), Cantëa (four), Lemenya (five), Enquëa (six), Otsëa (seven), Toldëa (eight), and Nertëa (nine).

I personally thought this was kind of cool. What do you all think?