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"
"from the clearing"
"of Julius, belonging to the Julian family"
"counsel guardian"
"my God is God, divine light"
"anointed one"
"victory, honor"
"firebrand, sword blade"
"hawk"
"heavens, celestial realm"
"he who has the people distressed"
"rest, repose"
"pillar, support"
"God is gracious"
"joy, happiness"
"courtyard, enclosure"
"estate of the fifth son"
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.