Are these official names?

No. These are fan-made names generated in the Forsaken style, not official names, intended for original characters and fan fiction.

Why do some names look ordinary and others sinister?

There are two registers. One keeps a plain period surname for a name carried over from life; the other swaps in a synthesized epithet like voidgriever to mark the undead identity. Both draw the first name from the same banks.

How should I use the two styles in a story?

Keep the given name fixed and switch the surname: use the plain form for who the character was alive and the epithet form for the Forsaken they became. The shared first name links the two.

Female Forsaken Names · Forsaken Name Generator

About female forsaken names

How female forsaken names are built

Results come in two registers. A plain living-style name pairs a large given bank (1200 male forms plus 1200 shared forms) with a real-looking surname (740 forms), giving names like Cornelius Leighton. A darker register replaces the surname with a synthesized epithet built from a grim mood word (101 forms) joined to a noun (111 forms), giving forms like Alexandrine voidgriever. Both share the given-name banks, so the same first name can read either as a former mortal or as an undead with a chosen death-name.

Cornelius Leighton
Cornelius (given, male bank) + Leighton (plain surname)
the living-style register keeps an ordinary period surname
Alexandrine voidgriever
Alexandrine (given, shared bank) + void + griever (synthesized epithet, mood plus noun)
the epithet register marks the post-death identity
Dunstan shrillhell
Dunstan (given, male bank) + shrill + hell (synthesized epithet, mood plus noun)

Naming notes

The plain surnames are ordinary period English in feel (Leighton, Marks), which suits a character who kept the name they had in life. The epithet half (void + griever, curse + fight, shrill + hell) signals the macabre, post-death identity instead. For fan fiction this split is useful: use the lived name for flashbacks and the epithet form for the present undead self. Keep the given name constant across both to tie the two together.

Questions about female forsaken names

Are these official names?: No. These are fan-made names generated in the Forsaken style, not official names, intended for original characters and fan fiction.
Why do some names look ordinary and others sinister?: There are two registers. One keeps a plain period surname for a name carried over from life; the other swaps in a synthesized epithet like voidgriever to mark the undead identity. Both draw the first name from the same banks.
How should I use the two styles in a story?: Keep the given name fixed and switch the surname: use the plain form for who the character was alive and the epithet form for the Forsaken they became. The shared first name links the two.