Are [name]Leo[/name] & [name]Luna[/name] too similar to be in a sib-set?
Not at all. [name]Just[/name] because names start with the same letter doesn’t make them similar, the second letter and last syllable of the names are different and therefore both names have completely different sounds to them. It’s hardly like they are [name]Cayden[/name] and [name]Brayden[/name]. 
A bit, but that doesn’t matter. It woulod be sweet. but not too sweet.
[name]Love[/name] it.