Gregory sits next to 3 phonetic neighbors — Geoffrey, Gregor, and Greg are the closest matches by sound. Most share Gregory's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"watchful, vigilant, alert"
"hillside dweller"
"peaceful, gentle as a dove"
"title of honor, great one"
"crossing, toll bridge operator"
"honest, steadfast"
"light, illumination"
"western clearing"
"God has given"
"God is my light"
"divine power (from Oswald)"
"right-handed, skillful"
"follower of Dionysus"
"lion-like, brave"
"of the Julian family"
"administrator of justice"
"son of Cadan"
"messenger, herald"
"world-mighty"
"bold counsel"
"God has given"
Similar sound: These names share phonetic patterns with Gregory — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Gregory.
Rhythm: Gregory is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.