Lucas Ruiz de Ribayaz y Fonseca (1626-after 1677) was a Spanish harpist and composer for lute and guitar.
Professionally, he was a theologian, but with a extensive knowledge of music, both as a scholar and performer.
Ribayaz returned to Madrid some time before the publication of a harp and guitar manual, Luz, y norte musical, para caminar por las cifras de la guitarra españióla, y arpa (Madrid, 1677).
The publication was endorsed by no less than Cristóbal Galán, maestro de capilla of the Convent of Las Descalzas Reales.
[2] Later in life he held a post in Villafranca del Bierco, in the province of Leon.