Xavier María de Munibe e Idiáquez, Count of Peñaflorida (23 October 1729 — 13 January 1785) was a Spanish writer and intellectual, known for his leading work in Enlightenment Spain and Basque literature.

For years the group maintained a regular program of discussing on mathematics on Mondays, physics on Tuesdays, history and literature on Wednesdays, geography on Fridays, and current events on Saturdays.

It devoted Thursdays and Sundays to concerts, including works written by members of the "Gentlemen of Azkoitia" such as Fray José de Larrañaga.

Out of these meetings evolved a more formal association, the Real Sociedad Bascongada de Amigos del País.

He also wrote the music and librettos of two bilingual (Spanish-Basque) comic operas, El borracho burlado (1764) and Comedia famosa.