Olivander sits next to 4 phonetic neighbors — Oliver, Oleander, and Lysander are the closest matches by sound. Most share Olivander's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"man of the olive tree"
"bear strength"
"great one"
"the new house"
"descendant of the dark one"
"far-reaching, bringer of completion"
"ash tree farm, settlement by ash trees"
"prosperous ruler"
"ancient, enduring"
"Yahweh has bestowed"
"little saint, holy one"
"rue plant, bitter herb"
"of the sun, relating to the sun"
"God will strengthen"
"ruler of the people"
"one million million (10^12)"
"valley dweller"
"prior, head of a priory or monastery"
"little wolf, wolf pup"
Similar sound: These names share phonetic patterns with Olivander — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin/Greek origins, giving them the same cultural heritage as Olivander.
Rhythm: Olivander is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.