Arbor sits next to 4 phonetic neighbors — Harbor, Amber, and Ardor are the closest matches by sound. Most share Arbor's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"tree bower, shaded alcove"
"strong spear"
"famous, renowned"
"that which has not yet come"
"golden one, radiant"
"cherry tree or fruit"
"pledge, oath (possible Celtic origin)"
"noble and devoted to God (possible interpretation)"
"holy reconciliation"
"woman of honor"
"industrious ruler"
"loved one"
"land ruler, powerful ruler of the land"
"cap maker or seller"
"lapis lazuli, precious blue stone"
"beloved"
"devoted to God"
"modern combination name (Kay + Lee)"
"slender, fair"
"lady, noblewoman"
"ugly head (original clan self-reference)"
Similar sound: These names share phonetic patterns with Arbor — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin arbor (tree) origins, giving them the same cultural heritage as Arbor.
Rhythm: Arbor is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.