I don’t think it’s quite name-y enough, and it’s quite the mouthful. Plus the “mum” part makes me think of...well, mothers. I like
Chrysanthe a lot better.
Nell Chrysanthemum / Chrysanthemum
Nell
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Used to be Azula
My ratable list:
https://www.behindthename.com/pnl/174843/136932