Greer sits next to 3 phonetic neighbors — Grear, Breer, and Veer are the closest matches by sound. Most share Greer's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"watchful, alert, vigilant"
"modern invented name, creative variant"
"noble, bright one"
"blind one (folk etymology)"
"permanent, perennial"
"victory of the people"
"thunder and lightning (via Raiden)"
"righteousness of God"
"God is my illumination"
"future, what is yet to come"
"one who burns, charcoal burner, distiller"
"firm, steadfast"
"from the River Clyde"
"dark one"
"from the gray estate"
"God will add, increase"
"God has heard"
"boundless, countless"
"modern coined name"
"white man, fair-haired man"
"lake dweller"
Similar sound: These names share phonetic patterns with Greer — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Greer.
Rhythm: Greer is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.