Nathalia sits next to 3 phonetic neighbors — Natalia, Natalie, and Nathalie are the closest matches by sound. Most share Nathalia's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"born on Christmas Day"
"counsel + lake"
"who is like God? (none compares)"
"oak tree, oak grove"
"navigator of the sea"
"victory of the people (via Colin/Nicholas)"
"orange tree (variant of Alani)"
"gentle horse"
"reborn, born again"
"life (Eva root)"
"from Brittany, land of Britons"
"sun (via Persian Kira)"
"promised by Yahweh"
"graceful jaybird"
"beloved, wished-for child"
"canopy of leafy boughs"
"wished-for child"
"child of heaven"
"baby kangaroo (informal)"
"mounted warrior, horseman"
"mighty in battle, strength in battle"
Similar sound: These names share phonetic patterns with Nathalia — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Nathalia.
Rhythm: Nathalia is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.