Arturo sits next to 4 phonetic neighbors — Arthur, Artur, and Arthurio are the closest matches by sound. Most share Arturo's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bear, bear king"
"of golden complexion"
"son, born of"
"divine staff, royal pillar"
"crowned one"
"famous ruler"
"valiant, brave"
"gift of God, praise"
"famous brilliance"
"of the gens Lucia (light)"
"dark-skinned, Moorish"
"brown, dark-complexioned"
"like unto God"
"created from red earth"
"he will enlighten, God shines"
"of the Frankish people"
"brave as a lion"
"the greatest"
"high, noble"
Similar sound: These names share phonetic patterns with Arturo — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Celtic origins, giving them the same cultural heritage as Arturo.
Rhythm: Arturo is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.