Adelheid sits next to 4 phonetic neighbors — Adelaide, Adelhaide, and Alheid are the closest matches by sound. Most share Adelheid's German-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Noble kind"
"Torch, bright one"
"demigod, hero"
"Resurrection, rising again"
"judge"
"Long, great, distant"
"pure, clear (via Katherine)"
"servant of God"
"noble, nobility"
"victory of the people"
"from the city of Verona, Italy"
"the other Aenor (Aliénor)"
"secret, mystery"
"Radiant, sun-like"
"member of the Gauts tribe"
"the other Aenor"
"fair, white, blessed"
Similar sound: These names share phonetic patterns with Adelheid — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old High German 'adal' (noble) + 'heid' (kind, type) origins, giving them the same cultural heritage as Adelheid.
Rhythm: Adelheid is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.