I'm pretty on-the-nose with things. As someone who RPs and makes a lot of OCs I tend to just think of what my character's backstory is and then pick a name that sounds nice that relates to their personality or past in some way. For example, when playing Atlyss I came up with a character that is mystic (spell based class) obsessed with surpassing death and communing with old gods. Eschatology is the part of theology focused on death, so I named her Escha. Am I original? Nah, but it works for me hehe
If I'm self-inserting I just use my real first name lol