Mario Esposito (7 September 1887 – 19 February 1975) was an Irish and Italian scholar who specialised in Hiberno-Latin studies.
The couple met in Naples, were married in London in 1879, and their oldest daughter was born in Paris, before the family settled in Ireland in 1882.
The family were well known in the artistic and literary circles of Dublin and numbered James Joyce and Samuel Beckett among their acquaintances.
He published his first article (on Dicuil) in the Dublin Review at the age of eighteen and produced a steady stream of publications for much of the rest of his life.
According to Michael Lapidge, Esposito "did more than any scholar before or since to appreciate and define Latin learning in medieval Ireland".