I quite like them both but as a sibset they definitely feel too matchy to me. Both start with L, both have the same number of syllables, the same number of letters, a very similar kind of flow, -ly somewhere in them, though it's pronounced differently, and
Lyra has an r, and I feel like if I was to say "
Lily,
Lyra" a lot of the time it could get mixed up, probably not on the brain level but on the tongue level for sure. :D I'm also not sure if
Lily and
Elsa make for the good combo. They are both so soft and have the same amount of syllables as well as a lot of l's in quite close proximity, also what would slightly bother me personally is that essentially they're variants of the same name since
Lily evolved from
Elizabeth as well. I think the only way it could work is if you put
Elsa at the end, and the other middle name in the middle. I'd also look for something longer, with a slightly less liquid vibe and ending wit a consonant. I had a hard time coming up with concrete combos though and couldn't think of anything that would feel convincing. One thing that's heavily on my mind when I think of
Lily and
Elsa together is the Swedish name Elsalill, which means "little
Elsa". I'm not sure though how well it would work for you and generally in the Anglophone world, perhaps if you like it and have some Scandinavian ancestry it could be an option...
Emilia Anna, doting cat mummy to Russian blue
Misha.
My PNL's:
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