Roberth sits next to 3 phonetic neighbors — Robert, Roberto, and Rupert are the closest matches by sound. Most share Roberth's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bright fame"
"standing up again, reborn"
"God is gracious"
"dear, beloved"
"crow, raven (from Basque bela)"
"son of Taveiro; from the hermitage"
"from the Vinicius family"
"brave-hearted, bold spirit"
"will, desire + helmet, protection"
"Yahweh is my strength"
"representative, lieutenant"
"small, humble"
"Gods gift"
"God will increase, God will add (José)"
"beloved of God"
"man of Rome, from Rome"
"God has given"
"virile, masculine, strong"
"spear ruler (from Gerardo)"
"crown, garland, wreath of honor"
Similar sound: These names share phonetic patterns with Roberth — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old High German origins, giving them the same cultural heritage as Roberth.
Rhythm: Roberth is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.