Mathilde sits next to 5 phonetic neighbors — Matilda, Mathilda, and Matilde are the closest matches by sound. Most share Mathilde's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"mighty in battle"
"beautiful"
"olive tree"
"defender of mankind"
"ivory-white, creamy white"
"merciful, compassionate"
"from Saint Denis"
"musical conclusion or tail"
"moon, moon goddess"
"from the fashionable London neighborhood"
"Work-power; industrious leader"
Similar sound: These names share phonetic patterns with Mathilde — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old High German origins, giving them the same cultural heritage as Mathilde.
Rhythm: Mathilde is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.