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Depends on the language ...

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First note, that the "t" in Melit- may still be part of the stem and that Melit- actually means "honey bee".

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In French, the ending -on was and is used to make names feminine and to create more familiar or diminutive forms like Manon, Nanon, or Alison (from Alice).

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So, Meliton may be explained as a French form of Melitta.

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Because you did not give additional information (gender, linguistic background) this is a shot in the dark and maybe completely mistaken.