Gibson sits next to 4 phonetic neighbors — Gideon, Winston, and Hudson are the closest matches by sound. Most share Gibson's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of Gilbert, son of Gib"
"throne"
"crooked hill; bent (cam) nose (sron)"
"elder, one of authority"
"ruler of the world"
"descent, gentle"
"the fifth"
"noble and ready"
"linden tree hill"
"son of Rand, son of the shield-wolf"
"God is salvation"
"slender, narrow"
"son of Garret, son of the spear bearer"
"guide, leader"
"from Airelle (Norman place name)"
"shelter, sanctuary"
"God is salvation"
"peace of the father"
"old town, settlement"
Similar sound: These names share phonetic patterns with Gibson — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have English origins, giving them the same cultural heritage as Gibson.
Rhythm: Gibson is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.