Marion sits next to 3 phonetic neighbors — Mary, Marian, and Miriam are the closest matches by sound. Most share Marion's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"beloved"
"noble, honored"
"strong, manly (via Andrew from Greek Andreas)"
"dark, black-haired"
"princess, noble"
"heavenly sea, sky and ocean"
"the beloved one"
"high, noble, strength"
"promised land, paradise"
"watchpost, guard"
"palm tree"
"variant of Romy/Rosemary (dew of the sea)"
"each of the two, pure"
"cloth walker, fuller"
"from the hollow, dweller in the hollow"
"alert, awake"
"noble kind"
"dark, dark-complexioned"
"ornament, adornment"
"god of wine and festivity"
"truth"
Similar sound: These names share phonetic patterns with Marion — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew via French origins, giving them the same cultural heritage as Marion.
Rhythm: Marion is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.