Cannon sits next to 3 phonetic neighbors — Canon, Cannan, and Cannon are the closest matches by sound. Most share Cannon's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"large gun, artillery piece"
"glory of the land"
"winding valley"
"mighty power, ruler"
"praise through music"
"from the settlement by the stone"
"plow blade maker or user"
"honest, steadfast"
"slender, bright-headed"
"tall stone"
"Lord (via Kyrie element)"
"bald (short for Calvin from Latin Calvinus)"
"declared innocent, acquitted"
"great forest, eagle valley"
"trained, experienced"
"river, great water (from Zaire)"
"slender"
"remembered by Yahweh"
"settlement at the inhospitable place"
"garden, vineyard"
"name of God"
Similar sound: These names share phonetic patterns with Cannon — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French origins, giving them the same cultural heritage as Cannon.
Rhythm: Cannon is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.