Harbor sits next to 4 phonetic neighbors — Harper, Harvey, and Harbor are the closest matches by sound. Most share Harbor's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"safe haven, shelter, refuge"
"deep blood-red color"
"from the long shore"
"steward, household manager"
"descendant of Bradan (salmon)"
"earth (via Gaia connection)"
"tube, channel"
"foreigner, of the Welsh"
"acquired, possession"
"divine water (Zoroastrian)"
"consecrated, worthy of reverence"
"from the rye meadow"
"light of God (related to Uriel)"
"hunter"
"asked of God, prayed for"
"heard by God"
"to carry, to bear"
"peace settlement"
"grey home, gravelly homestead"
"dark one"
"divine door (from Kobe, Japan)"
Similar sound: These names share phonetic patterns with Harbor — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Harbor.
Rhythm: Harbor is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.