Blessed Mariana Navarro de Guevarra Romero (17 January 1565 – 17 April 1624) was a Spanish Roman Catholic nun who became a member of the Mercedarian Tertiaries.
Upon admittance she took the name of Mariana of Jesus.
She was noted for a life of penance and the emphasis of devotion to the Eucharist.
Pope Pius VI beatified her after the recognition of two miracles and the cause still continues.
Another miracle is now under investigation and is needed for canonization.