Fun topic!
For me, sometimes a name will just pop up in my head, and other times I Google a list of common names (and especially surnames, those tend to be more difficult for me) for whatever geographical location makes sense for the story, and pick some. For Dutch characters I try to pick something that also works in English, or at least isn't a complete tongue breaker.
For
Sweet Revenge I used some anagrams. For
Author Regrets as well as
Sweet Revenge, I used bits and pieces of author names from this Library
