Kannon sits next to 4 phonetic neighbors — Cannon, Canon, and Kanon are the closest matches by sound. Most share Kannon's Japanese/Sanskrit-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"perceiving sounds, hearing the world's cries"
"gentle, tamed"
"vigor and power"
"descendant of Braonán, tearful one"
"genuine, bold"
"slender and fair"
"from Mauritania"
"rib, side"
"without wax, pure"
"dweller near the heath"
"warrior"
"ruler of the people"
"none compares to God"
"king"
"from the fen, marshland dweller"
"shield wolf, protector"
"land, territory"
"God has remembered"
"modern invented name, energetic spirit"
"roof maker"
"lives near a bridge"
Similar sound: These names share phonetic patterns with Kannon — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese/Sanskrit origins, giving them the same cultural heritage as Kannon.
Rhythm: Kannon is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.