Seán Ó hEinirí (26 March 1915 – 26 July 1998), known in English as John Henry, was an Irish seanchaí ("traditional storyteller" or "bearer of the old lore") and a native of Cill Ghallagáin in County Mayo.

In later years, his stories were recorded by Séamas Ó Catháin of the Department of Irish Folklore from 1975 onwards for more than ten summers.

A great deal of this work was published in "Scéalta Chois Cladaigh" ("Stories of Sea and Shore")[4] in 1983 by the Folklore of Ireland Council (Comhairle Bhéaloideas Éireann).

[5] Ó hEinirí also provided a large number of words and expressions to the lexicographer Tomás de Bhaldraithe, who incorporated these into his influential English-Irish Dictionary, published in 1959.

[3] In addition to this, he gave over 800 minor place-names to Patrick O'Flanagan of the Folklore Commission for the 1974 book The Living Landscape, Kilgalligan, Erris.