The two Caballero individuals mentioned above are each descended from brothers who are themselves descendents of Lucas Caballero. 1st is Lucas Domingo Caballero, descended from Juan Caballero Olivos. He married as 2nd wife Juana María Paz Guerra, and they had Pedro Joseph Caballero. The 2nd is Joseph Eusebio Leonardo Caballero, descended from Juan’s brother, also named Lucas after his father. He married María Guadalupe Rodríguez and they also had a Pedro Joseph Caballero. The two Pedros were born 3-5 years of each other and are cousins. It would seem there is no way to determine which one is correct for you… but they do share a common ancestor.