Psalm sits next to 3 phonetic neighbors — Sam, Calm, and Palm are the closest matches by sound. Most share Psalm's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"sacred song, hymn"
"son of the firebrand"
"land of the Bronck family"
"royal power, royal ruler"
"God is gracious"
"God heals"
"thatcher, roof builder"
"divine, of Zeus"
"fair administration of law"
"noble lord"
"God has given, gift"
"spear, battle"
"may God protect"
"lowlands"
"strength, vigor"
"near the holly trees"
"all wise (from Norse Alviss)"
"Macks settlement"
"modern invented name"
"from Dayton"
Similar sound: These names share phonetic patterns with Psalm — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Psalm.
Rhythm: Psalm is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.