Navy sits next to 4 phonetic neighbors — Davy, Gracie, and Sadie are the closest matches by sound. Most share Navy's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"dark blue, naval fleet"
"white or bright settlement"
"God is my strength"
"woodland clearing"
"night"
"lovable, deserving of love"
"sea of bitterness"
"lady, queen"
"fortress on the river (possible Celtic root)"
"strong, manly"
"descendant of the young warrior"
"meadow, clearing"
"variant of Mary (beloved, bitter)"
"battlefield"
"God is gracious"
"of the forest"
"son of Matthew, gift of God"
"broken land"
"ruler of supernatural beings"
"noble natured"
"born eighth, eighth child"
Similar sound: These names share phonetic patterns with Navy — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have English origins, giving them the same cultural heritage as Navy.
Rhythm: Navy is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.