Brittany sits next to 3 phonetic neighbors — Britney, Brittney, and Brittani are the closest matches by sound. Most share Brittany's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"from Brittany, land of the Britons"
"brave, strong, manly"
"weary"
"sun"
"bright green gemstone"
"feminine form of Michael"
"graceful, beautiful"
"heavenly garland, child of heaven"
"modern invented name (Jay + lani)"
"supplanter, one who follows"
"dweller by the swamp"
"lily flower"
"precious gemstone formed in oysters"
"army host, expedition"
"lady, noblewoman"
"she who destroys the light"
"born on Christmas Day, birthday of the Lord"
"of the lyre, musical expression"
"independent one"
"beloved child"
"God is gracious"
Similar sound: These names share phonetic patterns with Brittany — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Brittany.
Rhythm: Brittany is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.