Karolyn

• Same eraBarbaraLike Karolyn, it was given most in the 1940s.#968 · steady
• Same rhythmAddilynSame beat as Karolyn: three syllables, stress on the first, ending on a consonant, but it starts differently.#987 · falling
• ShorterHenleyTwo syllables to Karolyn's three, so you can tell them apart when you call both.#1,000 · falling
• LongerAkiraFour syllables to Karolyn's three: a long name beside a short one keeps them distinct.#983 · 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.