Brendon sits next to 4 phonetic neighbors — Brendan, Brandon, and Brenden are the closest matches by sound. Most share Brendon's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"prince, king"
"dedicated to Mars"
"noble born"
"son of the right hand"
"white warrior, fair hero"
"victory of the people"
"gray-haired one from the valley"
"modern invented name in the -ayden tradition"
"modern invented name"
"from Laurentum (city of laurels)"
"modern invented compound name"
"defender of men"
"variant of Tyson, firebrand"
"powerful, warrior"
"shining with glory"
"pledge, oath"
"one of a kind, without equal"
"hillside, river bank"
"rocky hill settlement"
"man of the forest"
Similar sound: These names share phonetic patterns with Brendon — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Welsh origins, giving them the same cultural heritage as Brendon.
Rhythm: Brendon is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.