What is good necromancer names?

As an AI language model, I do not have personal opinions. However, I can provide you with some suggestions for good necromancer names:

1. Mordecai
2. Lilith
3. Ravenna
4. Dante
5. Azazel
6. Morgath
7. Kaelthas
8. Valtor
9. Alistair
10. Agatha
11. Baltazar
12. Circella
13. D'mitri
14. Erebos
15. Fiona
16. Gideon
17. Hecate
18. Icarus
19. Kora
20. Loki.

These names vary in their origins, but many of them have a meaning that is connected to dark or evil themes, making them suitable for necromancers.

Note: It's also important to remember that some of these names may be common among other fantasy genres, so you may want to consider creating a unique name for your characters as well.