Do any of these names sound outlandish or childish/immature or do not flow

well (fantasy names)? I've just been looking over some of the names in my story from beginning to end and I'm deciding whether or not they sound right. I'll leave a list and then explain what it is in Additional Details if anyone asks.
These are NOT all of the names, just the ones I'm unsure of.

Names of Items, Objects, and Careers:
Lexilea (career)
Plethorae (item)
Abysmalei (object)
Illuminati (object)
Deluminati (object)

Names:
Phinnaeus Orphelius-Ozias Exeptimus (Poe for short) (m)
The surname "Loyalar"
Mitzi (f)
Fendrel (m)
Kismet (f)
the surname "Drover"
the surname "Gyver" (I'm really not sure on this one)
Kristopher Tolkien (m)
Vol (stands for Veil of Life)
the surname "Scarch"

Thanks!
Sorry, the name of that second list was meant to say "Names of People:"
@Chris Randomness: Huh, I never knew that... about the man who did magic with paperclips, anyway. Maybe I'll give my character a little fascination with paperclips now :) that would actually fit her character, anyway. And I do know that Tolkien wrote the Lord of the Rings series, but I liked his last name. I just wasn't sure if it would be appropriate to use a well-known author's name as a fantasy character's name in a book. Although I don't see why it would be, I just wasn't 100% sure.
@Kitty: Oh, my Fendrel is the name that I used for a prince and the name that I used for Daxter's twin brother. (Yes, Daxter has a twin brother now, but they don't meet up very often.)
@Kescha Baby: Well that's coincidence if I've ever seen it!
 
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