Lily,
Eliana and
Luna.
Full names:
Lily Aurora,
Eliana Rose and
Luna Matilda.
I don't really like the fact that
Lily and
Luna both have two syllables and start with an L but it doesn't bother me that much either.
Luna means moon and
Eliana sun which is a coincidence but kind of nice. And
Lily and
Rose are both flowers so all names are connected in a way, by coincidence.