Jania sits next to 5 phonetic neighbors — Jana, Tania, and Sonia are the closest matches by sound. Most share Jania's Polish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God is gracious"
"near to God"
"of Mars; warlike"
"peace (from Irene element)"
"lake, pool"
"little rock, steadfast"
"brave lion"
"clear, cloudless (weather)"
"myrrh, sweet resin"
"princess, noble"
"beloved of the sky"
"brisk, cheerful"
"one's own meadow, solitary clearing"
"the new one, renewer"
"renewed, spiritually reborn"
"God is gracious"
"help, strength"
"successful, beloved"
"queen mother, great woman"
"just, righteous, upright"
"crowned with laurels (via Stephanie)"
Similar sound: These names share phonetic patterns with Jania — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Jania.
Rhythm: Jania is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.