Isaac

• Same eraCarterLike Isaac, it was given most in the 2010s.#45 · falling
• Same rhythmGraysonSame beat as Isaac: two syllables, stress on the first, ending on a consonant, but it starts differently.#51 · falling
• ShorterCharlesOne syllable to Isaac's two, so you can tell them apart when you call both.#48 · steady
• LongerAnthonyThree syllables to Isaac's two: a long name beside a short one keeps them distinct.#46 · steady
• RiskyIssacOne letter away from Isaac. You'll call the wrong one for years.#915 · falling

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.