Lu

• Same eraNancyLike Lu, it was given most in the 1950s.#965 · steady
• Same rhythmTruSame beat as Lu: one syllable, ending on a vowel sound, but it starts differently.#972 · rising
• LongerHenleyTwo syllables to Lu's one: a long name beside a short one keeps them distinct.#1,000 · falling
• RiskyLuzOne letter away from Lu. You'll call the wrong one for years.#838 · steady

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.