Iarfhlaith as a Baby Name. Meaning and Origin of Iarfhlaith

What is the meaning of the name Iarfhlaith ?

The baby name Iarfhlaith is a Male name , 2 syllables long and is pronounced IPA: /ˈiːəɾl̪ˠə/; Anglicized respelling: EE-ar-lah.

Iarfhlaith is Irish in Origin.

Iarfhlaith is an Irish Gaelic masculine name from Old Irish iar- “after; west” + flaith “ruler, prince”. The spelling with fh reflects lenition of f; in modern standard Irish the name is often written Iarlaith, while Iarfhlaith persists in literary and regional usage. The meaning is commonly taken as “lord of the west,” though “successor‑ruler” is also etymologically possible.

Documented since early medieval Ireland, it is borne most famously by Saint Iarlaithe of Tuam (anglicized Jarlath), a 6th‑century founder and patron whose cult anchored the name in Connacht for centuries. Usage waned under Anglicization but has enjoyed periodic revival with Gaelic‑language naming. Variants and related forms include Iarlaith, Iarlaithe (a genitive form used as a given name), and the Anglicized Jarlath; the root element flaith also appears in names such as Flaithrí.