Francis

• Same eraDorothyLike Francis, it was given most in the 1920s.#421 · rising
• Same rhythmOpalSame beat as Francis: two syllables, stress on the first, ending on a consonant, but it starts differently.#423 · rising
• ShorterJoyOne syllable to Francis's two, so you can tell them apart when you call both.#419 · steady
• LongerMelissaThree syllables to Francis's two: a long name beside a short one keeps them distinct.#419 · steady
• RiskyFrancesOne letter away from Francis. You'll call the wrong one for years.#318 · rising

Suggestions come from names in this year's top 1,000. Rhythm and rhyme are judged from each name's pronunciation (Wiktionary's, or espeak's reading of the spelling), so a few calls may be off.