Roberta sits next to 3 phonetic neighbors — Alberta, Robyn, and Ramona are the closest matches by sound. Most share Roberta's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bright fame"
"soul-like, spiritual"
"victors crown"
"queen of the gods"
"social gathering, party"
"water forever, eternal waters"
"noble and gracious"
"beloved"
"supplanter, one who follows at the heel"
"afflicted by God"
"golden"
"fair hero's descendant"
"blessed peacemaking, holy reconciliation"
"slope, hillside"
"priceless, praiseworthy"
"miracle"
"friend, ally"
"nation, community"
"beautiful, pleasant"
"alone, solitary"
"free person (feminine of Charles/Karl)"
Similar sound: These names share phonetic patterns with Roberta — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Roberta.
Rhythm: Roberta is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.