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"
"flourishing"
"God hears"
"gift of God"
"pilgrim to Rome; from Rome"
"manly, brave"
"manly, brave"
"noble, mighty of God"
"divine strength"
"victory of the people"
"of the Sergii clan"
"bold journey, brave adventurer"
"of the bean growers (Fabii clan)"
"prosperous spearman"
"tiller of the soil, agriculturalist"
"strong man, manly"
"happy, fortunate"
"protector of people"
"God is salvation, YHWH saves"
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.