Artur sits next to 3 phonetic neighbors — Arthur, Arturo, and Artur are the closest matches by sound. Most share Artur's Portuguese-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bear king"
"the just one"
"bright north, famous northerner"
"fierce glory"
"sun god"
"lion of God"
"given by God"
"destroyer"
"navigator, guide"
"small; humble"
"blessed one"
"from Żagań (city in Poland)"
"grace of Melqart (Carthaginian god)"
"of the coin, of money"
"noble lineage (adal) and eager (funs)"
"short form of Andre/Andrew"
"son of Aphrodite, Sicilian king"
Similar sound: These names share phonetic patterns with Artur — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Celtic origins, giving them the same cultural heritage as Artur.
Rhythm: Artur is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.