Oswald sits next to 4 phonetic neighbors — Gerald, Harold, and Osbert are the closest matches by sound. Most share Oswald's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"divine power, God's rule"
"God is gracious"
"buck's meadow, deer clearing"
"son of marsh dwellers"
"God has remembered"
"settlement by a bird-trap"
"well-spoken, good word"
"counsel, decision"
"creative modern spelling variant"
"star"
"sky"
"God will save"
"son of Elijah"
"lasting, enduring"
"battlefield (poetic extension)"
"those who are friendly"
"invented blend of Bray and Lynn"
"rope maker, cord seller"
"messenger of God"
"enclosed pasture, fortified place"
"thankful"
Similar sound: These names share phonetic patterns with Oswald — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English os weald origins, giving them the same cultural heritage as Oswald.
Rhythm: Oswald is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.