Not sure if I have answered this ECuilty, but here is what I have compiled:
Julio's other sibling was Genero (1891-1931). The mother to the 4 of them [Genero, Henrietta (1894-1984), Julio (1895-1960) and Amelia (1900-1930)] was Felicita Ramos. She was the 3rd wife to Enrique Cuilty, son of Gabino and Maria Bustamante. Enrique would be your great-grandfather, as he was my dad's as well.