Anastacio sits next to 4 phonetic neighbors — Anastasia, Ignacio, and Eustacio are the closest matches by sound. Most share Anastacio's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"resurrection, one who will rise again"
"mind-bold"
"one who serves, preserver"
"flat-footed"
"of the vine, wine merchant"
"dim-sighted, unseeing"
"victorious (if related to Cairo)"
"industrious, striving"
"defender of the people"
"God is with us"
"son of Taveiro; from the hermitage"
"beloved, good"
"lion-man, brave as a lion"
"wealthy guardian, guardian of prosperity"
"may God strengthen him"
"the new house"
"anointed one who carries"
Similar sound: These names share phonetic patterns with Anastacio — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Anastacio.
Rhythm: Anastacio is a 5-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.