Gaston sits next to 4 phonetic neighbors — Weston, Triston, and Aston are the closest matches by sound. Most share Gaston's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"guest, stranger"
"my Lord, my Master"
"young goat (shield bearer)"
"new house, bright place"
"rock, stone"
"anointed one"
"courtyard, enclosure"
"from Rome, Roman citizen"
"son of Denis"
"heavens, celestial realm"
"God is gracious"
"pillar, support"
"the king"
"blazing torch, flaming sword"
"he who has the people distressed"
"bright north, famous northerner"
"God with us, divine presence"
"devoted to Demeter, follower of the earth goddess"
"liberator of men, one who frees"
"son of the sword"
Similar sound: These names share phonetic patterns with Gaston — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Frankish/Germanic origins, giving them the same cultural heritage as Gaston.
Rhythm: Gaston is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.