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"
"pearl"
"modern invented blend of Ava and Savannah"
"God has afflicted"
"successful, one who attains her goals"
"to cross over"
"freckled, speckled"
"of gold, golden-haired"
"beautiful song"
"valiant; brave"
"ancient, primordial"
"house, home"
"creative blend name"
"estate of the fifth son"
"apple (in Italian)"
"bright, shining one"
"one's own meadow"
"park by the lake"
"to go up, ascend"
"son of James"
"gentle strength"
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.