Leon

• Same eraCharlieLike Leon, it was given most in the 1920s.#145 · rising
• Same rhythmDeclanSame beat as Leon: two syllables, stress on the first, ending on a consonant, but it starts differently.#139 · falling
• ShorterGeorgeOne syllable to Leon's two, so you can tell them apart when you call both.#126 · steady
• LongerJamesonThree syllables to Leon's two: a long name beside a short one keeps them distinct.#137 · falling
• RiskyLeoOne letter away from Leon. You'll call the wrong one for years.#19 · 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.