Sibling name question

Our 3y/o's name is Bella - "Bella Jayne Little". So far the only middle name we can come up our next daughter due this June is Belle -  "Luna Belle Little". 
Do you think it'll cause an issue between them in future or is it nice to have a similar middle/first name to kinda link the two of them? Can't figure out if we're just blinded by the pretty name and not thinking logically :/

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