Lisbon sits next to 3 phonetic neighbors — Gibson, Ribbon, and Lindon are the closest matches by sound. Most share Lisbon's Portuguese-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"safe harbor"
"Variant of Theia; Greek Titan goddess of sight and the sky, mother ..."
"small, little"
"the clove spice, nail-shaped flower bud"
"lover, sweetheart"
"friend; ally"
"home, house-maker (via Mason/Maison)"
"fisherman"
"thornbush clearing"
"lake colony settlement"
"little king, kingly (from Ryan)"
Similar sound: These names share phonetic patterns with Lisbon — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Phoenician origins, giving them the same cultural heritage as Lisbon.
Rhythm: Lisbon is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.