Bosco sits next to 4 phonetic neighbors — Rocco, Marco, and Cosco are the closest matches by sound. Most share Bosco's Italian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"forest, woodland"
"brother (informal)"
"king"
"belonging to the night"
"God is my salvation"
"woodland clearing, meadow"
"growth, abundance, increase"
"priest"
"Kent dale, valley settlement"
"descendant of Bradan (salmon)"
"the green one, the verdant, the ever-living"
"God is gracious, Yahweh is gracious"
"that which is yet to come"
"deep blood-red color"
"beloved, praised"
"king, ruler"
"island meadow"
"vigilant in battle (from Casey/Cathasach root)"
"from the court"
"measuring instrument, standard dimension"
"cat"
Similar sound: These names share phonetic patterns with Bosco — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Italian/Medieval Latin origins, giving them the same cultural heritage as Bosco.
Rhythm: Bosco is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.