About Rosario Arenas Aguirre
Rosario Arenas Aguirre was widowed when she married Carlos Arenas Dávila. At the time of their marriage, Rosario Aguirre had a son, Alfonso from her first marriage (last name unknown). Rosario Aguirre was the first wife of Carlos Arenas Dávila.
Carlos and Rosario had one daughter together (Alicia Arenas (married name = Alicia Ramírez.). So Alicia had a half- brother from her Mom's first marriage. When Rosario died, Carlos Arenas Dávila married Rosario Arenas Chiques.
Source: Miriam Vega (Ramirez) (from memory communicated through Geni to Anthony M. Graziano)
Still Unknown: How old was she when she married Carlos? (Rosario Arenas (Chiques) (Carlos other wife) died in 1977, and Carlos himself died circa 1951 -