Katana sits next to 4 phonetic neighbors — Montana, Savanna, and Lantana are the closest matches by sound. Most share Katana's Japanese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"samurai sword, symbol of honor"
"possibly related to Eliza (my God is an oath)"
"upright, virtuous"
"noble woman"
"modern invented nature name"
"combination of Avery and Everly"
"intoxicating, she who intoxicates"
"industrious, striving, vigorous"
"from India, land of the Indus"
"dark-feathered bird, the raven"
"who is like God"
"God is gracious"
"flowing river"
"high, noble"
"of the mind, intellect"
"light and warmth from the sun"
"ewe (from Rae/Rachel) + meadow (from Lee)"
"courageous, valiant"
"breath of life"
"romantic love, the god of love"
"rose or lily flower"
Similar sound: These names share phonetic patterns with Katana — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese origins, giving them the same cultural heritage as Katana.
Rhythm: Katana is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.