Tierney sits next to 4 phonetic neighbors — Tiernan, Tiffany, and Tierney are the closest matches by sound. Most share Tierney's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"lord, master, lordly one"
"friendship, constancy (flower language)"
"sea and sky"
"light, torch"
"serene, calm, clear"
"reborn, born again"
"bird, life-breath"
"peaceful, calm"
"diamond, brilliant"
"contemplation, vision"
"you are loved"
"little drop of moisture, rain"
"bliss, good fortune, happiness"
"grace, favor"
"whole, universal ruler"
"my father is joyful"
"honesty plant (botanical genus)"
"literary invention, name of the Mother Confessor"
"complete grace, wholly gracious"
"free woman"
"modern invented name"
Similar sound: These names share phonetic patterns with Tierney — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Irish tiarna origins, giving them the same cultural heritage as Tierney.
Rhythm: Tierney is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.