Here is what each character's name really means:

Feyre- beautiful/ fairy or elf

Rhysand- perfection/ bringer of darkness

Nyx- night

Azriel- God is my help

Cassian- hollow, empty

Morrigan/ Mor- great queen

Nesta- pure

Amren- powerful, clever, logical mind

Elain- sun ray/ fawn

Gwyneth/ Gwyn- joy

Emerie- winner

Lucien- light

Tamlin- independent

Let me know if u want a part 2

I'm surprised some of them actually equal the character lol. I think I know where SJM gets her ideas for character's names from :)