Lilja sits next to 5 phonetic neighbors — Lily, Lilya, and Leila are the closest matches by sound. Most share Lilja's Old Norse-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"lily flower"
Similar sound: These names share phonetic patterns with Lilja — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Norse origins, giving them the same cultural heritage as Lilja.
Rhythm: Lilja is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.