Francisco sits next to 3 phonetic neighbors — Francesco, Franco, and Francis are the closest matches by sound. Most share Francisco's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Free man, Frenchman"
"God is gracious"
"God's spear"
"male, masculine"
"raised by Yahweh"
"tiller of the soil, agriculturalist"
"brave and powerful"
"strong man, manly"
"angel; messenger of God"
"male, virile"
"defender, protector"
"foundation stone"
"conqueror, winner"
"head of hair"
"victory of the people"
"farmer; earth worker; tiller of the soil"
"birth, nativity"
Similar sound: These names share phonetic patterns with Francisco — similar vowel sounds, consonant clusters, or rhythm.
Rhythm: Francisco is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.