Blessed Rafaela Ybarra Arambarri de Vilallonga (16 January 1843 – 23 February 1900) was a Spanish Roman Catholic widow and the founder of the Sisters of the Holy Guardian Angels.
Vilallonga was part of Bilbao's upper-class and she mothered seven children with her husband José Vilallonga.Her beatification was celebrated on 30 September 1984.