Soul sits next to 4 phonetic neighbors — Cole, Joel, and Sol are the closest matches by sound. Most share Soul's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"spiritual essence, animating force"
"he laughs, laughter"
"rock, harbor"
"from Laurentum; laurel-crowned"
"chief, brave man"
"sky father, father of gods"
"strong; speckled one"
"great tide, sea wave"
"the Christian cross"
"old friend"
"vision, ghost"
"narrow valley, mountain valley"
"son of Carr, from the marsh"
"variant of Jason (healer) or Jacob (supplanter)"
"rocky hill settlement"
"remembered by the Lord"
"oak tree ford"
"sadness, melancholy"
"from Tyre, the ancient city"
"Son of Walter"
"elaboration of Ahmad (most praised)"
Similar sound: These names share phonetic patterns with Soul — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Soul.
Rhythm: Soul is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.