Kaido sits next to 4 phonetic neighbors — Kai, Cairo, and Kaid are the closest matches by sound. Most share Kaido's Japanese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"sea road, highway"
"settlement by the fish dam"
"twin"
"one who moves smoothly"
"friend of horses"
"ruler of the home"
"eternal, everlasting"
"craftsman, smith"
"the great one, the high one"
"strong lord"
"watchman, alert"
"son of the grey-haired one"
"gift from God, he who is sent"
"son of Hutch (Hugh)"
"manly beauty, sun god"
"jaybird, joyful"
"dark settlement"
"dignity, nobility"
"of the court, refined"
"son of the sea, born from ocean waves"
"coal settlement; dark farmstead"
Similar sound: These names share phonetic patterns with Kaido — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese origins, giving them the same cultural heritage as Kaido.
Rhythm: Kaido is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.