Grenville sits next to 3 phonetic neighbors — Granville, Glenville, and Orville are the closest matches by sound. Most share Grenville's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Large or great settlement (from French grande ville)"
"star"
"beloved, dear"
"invented name, possibly taming guide, with rhythmic African America..."
"serious, earnest"
"high, elevated"
"upper settlement, settlement above the valley"
"son of Daniel"
"Modern creative name inspired by Damian (to tame/subdue) with a dis..."
Similar sound: These names share phonetic patterns with Grenville — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Anglo-Norman French origins, giving them the same cultural heritage as Grenville.
Rhythm: Grenville is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.