Harbor sits next to 4 phonetic neighbors — Harper, Amber, and Harbour 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
"shelter, safe haven"
"friend, beloved companion"
"high, exalted"
"oak tree"
"white, fair"
"life, bird"
"calm waters, peaceful"
"modern blend of Taylor and -lyn suffix"
"high, noble"
"queen of the gods (variant of Juno)"
"beloved, dearest friend"
"golden, of gold"
"his gift"
"spirited one, descendant of Bradach"
"glowing waterfall, shining light"
"fair and smooth"
"chief, noble one"
"son of Hugh, child of heart and spirit"
"Botolph's stone, settlement by the forest"
"slender meadow"
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.