Blu sits next to 4 phonetic neighbors — Blue, Bleu, and Beau 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, sky"
"stammering"
"beloved"
"variant of Jason"
"pool near the elm tree"
"wise counsel and army, counseling warrior"
"of gold, golden one"
"carved by force, shaped by power"
"of the valley"
"first of the month, calends"
"rival, eager to excel, striving"
"Yahweh is my God"
"shining, brilliant"
"famous shouter, distinguished one"
"healer, to heal"
"to carry, to endure"
"ornament, necklace"
"raven (sacred Celtic bird)"
"powerful, compassionate (fictional origin)"
"little fire (via Aiden root)"
"from the rocky hill, crag dweller"
Similar sound: These names share phonetic patterns with Blu — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French 'bleu' via Germanic 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.