Anastacia sits next to 3 phonetic neighbors — Anastasia, Stacia, and Stacy are the closest matches by sound. Most share Anastacia's Russian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"resurrection, she who shall rise again"
"peace"
"noble and gracious"
"gift of God"
"God is gracious"
"gift of God"
"priceless, inestimable"
"of the Sabine people"
"fond of horses (philos + hippos)"
"from the Priscus family"
"slope, hillside"
"good speech"
"place of Habaguanex (a Taino chief)"
"wind, breath"
"God has shown favor"
"gift from God"
"place of the Prophet, radiant city"
"clear ice, rock crystal"
Similar sound: These names share phonetic patterns with Anastacia — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Anastacia.
Rhythm: Anastacia is a 5-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.