Brenner sits next to 4 phonetic neighbors — Brennan, Brener, and Brenna are the closest matches by sound. Most share Brenner's German-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"one who burns, charcoal burner, distiller"
"the free one, freedom"
"covered with dust"
"deep affection, tender devotion"
"God is perfect, Yahweh is upright"
"acquired, possession"
"bright will, shining desire"
"right-handed, skillful"
"one who fights in combat"
"dark one"
"ruler with the spear"
"divine friend, friend of God"
"eagle, nobleman"
"sword"
"distinguished leader"
"one from the sea"
"priceless, of inestimable worth"
"sharp, precise, swift (symbolic interpretation)"
"elevated, sublime, lofty"
"victory of the people"
"healer (via Jason)"
Similar sound: These names share phonetic patterns with Brenner — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Middle High German origins, giving them the same cultural heritage as Brenner.
Rhythm: Brenner is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.