Cairo sits next to 5 phonetic neighbors — Kyro, Cyrus, and Kairo are the closest matches by sound. Most share Cairo's Arabic-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"city of a thousand minarets"
"perfect knowledge"
"mine, belonging to me"
"yellow, fair (light-haired)"
"wisdom, creativity (Celtic symbolism)"
"shining light, day"
"ivory, creamy white material"
"city of light, Varanasi"
"dweller near the ash tree grove"
"endless, boundless, without limit"
"bright meadow (invented combination)"
"light brown color (hazel eyes)"
"sweetness, golden nectar"
"pause and reflect"
"place by the bridge"
"lily (flower)"
"purity, innocence"
"place of camas, sacred meadow"
"exaltation (Selah)"
"spear ruler"
"modern invented name"
Similar sound: These names share phonetic patterns with Cairo — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Arabic origins, giving them the same cultural heritage as Cairo.
Rhythm: Cairo is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.