Greg sits next to 3 phonetic neighbors — Craig, Brad, and Drake are the closest matches by sound. Most share Greg's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"watchful, alert"
"ray of light + God is gracious"
"clear, bright"
"leader, superior one"
"settlement by the fish dam"
"hill"
"lover of horses"
"from the ash tree valley"
"lord of the rocks; from Tyre (ancient Phoenician city)"
"fame and glory"
"manly beauty, sun god"
"playful one"
"placeholder birth name turned given name"
"Southern American place name as given name"
"energy, spirit, vigor"
"of Mars, warrior (Marius element)"
"salvation of the Lord"
"God's faithful one"
"steep meadow or woodland clearing"
"the king"
Similar sound: These names share phonetic patterns with Greg — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Greg.
Rhythm: Greg is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.