Fionnlaith as a Baby Name. Meaning and Origin of Fionnlaith

What is the meaning of the name Fionnlaith ?

The baby name Fionnlaith is a Male name , 2 syllables long and is pronounced FIN-lah (IPA: /ˈfɪn.lə/).

Fionnlaith is Gaelic in Origin.

Fionnlaith is a rare Gaelic given name with roots in Old Irish, built from fionn “fair, white, bright” and a second element interpreted in two ways: liath “grey” or láth/láith “strength, might.” Most scholars read it as “fair-grey,” an epithet describing complexion or hair, while an alternative analysis yields “fair-strong/bright-strong.” The name belongs to the same fionn family as Fionn and Fionnuala but is etymologically distinct from Finlay (Gaelic Fionnlagh “fair hero”).

Medieval Irish annals attest forms such as Finnláith and Findláith, often borne by women from noble lineages, while the closely related descriptive compound appears in the byname of Áed Findliath, a 9th‑century High King of Ireland. In modern times Fionnlaith remains uncommon, sometimes revived in Irish-language circles and typically used for girls. Recorded variants include Finnláith, Findláith, and modernized Fionnláith; Anglicized, unaccented spellings like Fionnlaith also occur.

⚙ Fionnlaith turns up in none of the birth registries or name datasets we cover. That's typically a sign of a rare name, a regional or traditional one, or a modern coinage. Either way, it remains a genuinely rare choice.