If I understand your message correctly, the family tree I have shows your grandfather was José Antonio Roselló son of Antonio Matías Roselló y Casaverde and Eduviges González y ?.
José Antonio Roselló y González and Enriqueta Vázquez y Pomales had a daughter Eduvigis "Vivita" Roselló y Vázquez who married Emilio Cuebas y Laforet. The parents of Emilio Cuebas y Laforet were Eugenio Cuebas y Arredondo and Dolores Laforet y Cubino.
Eugenio's parents were Eugenio Cuebas and María Teresa Josefa Arredondo. Dolores' parents were Luis Laforet and Dolores Cubino.
Mike Ruddy
mpruddy@gmail.com