Blu sits next to 4 phonetic neighbors — Blue, Bleu, and Boo are the closest matches by sound. Most share Blu's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"the color blue"
"from the valley (from dae)"
"beautiful, honest (in Japanese tradition)"
"crooked nose, winding river bend"
"of gold, golden-haired"
"valley grace"
"jasmine flower"
"living, alive, thriving"
"content, satisfied"
"lion of God"
"life"
"willow tree"
"Marian devotion + floral beauty"
"cleft, divided by force"
"little bear"
"life (from Ava root)"
"a star that suddenly brightens"
"one who knows, connoisseur"
"God is my help"
Similar sound: These names share phonetic patterns with Blu — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Italian/English origins, giving them the same cultural heritage as Blu.
Rhythm: Blu is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.