Herbert sits next to 3 phonetic neighbors — Hubert, Albert, and Robert are the closest matches by sound. Most share Herbert's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bright army, famous warrior"
"strong, hardy"
"people's champion"
"salt"
"brave, watchful"
"home ruler, power"
"leopard, swift and fierce"
"Greece, land of wine"
"God prevails"
"settlement at the clean/pure place"
"of the wood, forest"
"modern invented name"
"three (via Trey prefix)"
"modern invented name (no traditional meaning)"
"settlement by a church, church village"
"hunter, one who hunts or pursues"
"crooked river"
"divinely chosen"
"western meadow, western clearing"
"little raven"
"warrior people (Cree)"
Similar sound: These names share phonetic patterns with Herbert — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Herbert.
Rhythm: Herbert is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.