Sibling names with a shared or paired theme

How we chose them: each pair is from the same tradition, and each name's main checked meaning is either the same theme (light, flowers) or one of two themes that go together (the sun and the moon, stars and sky, rivers and water, strength and courage). The two names start with different letters so they don't blur together when called out. Genders are mixed; swap in any name from the theme's page to suit your family.

Worth knowing: these are suggestions built from meanings, not a ranking. Say both names aloud with your surname, and check that the initials work.