Adair sits next to 5 phonetic neighbors — Adele, Blair, and Clair are the closest matches by sound. Most share Adair's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"ford at the oak tree"
"pure, clear"
"peaceful, safe"
"transparent, clear as crystal"
"honor, compassion"
"land of brazilwood, ember-red wood"
"cheerful, joyful"
"god of war"
"sea of bitterness + rose (alternative Mary etymology)"
"descendant of Andrew"
"creative modern variant of Celia/Shelia"
"broken land, marsh"
"thanks, gratitude"
"of noble kind"
"brave, powerful ruler"
"from the Alara River (Antalya, Turkey)"
"moon, moon goddess"
"lives near reed beds"
"of Jove, sky blessing"
"supplanter's descendant"
"miracle, wonder"
Similar sound: These names share phonetic patterns with Adair — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Scottish Gaelic origins, giving them the same cultural heritage as Adair.
Rhythm: Adair is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.