I have heard similiar stories which my grandfather had told my father which had been relayed to him by his father. The whole "Blood revenge" is true not only with peasant but also with nobility fighting amongst themselves for total power and complete control. The story is that twin brothers with our last name were weary of the battle for money and power so they decided to leave, one came to the U.S./California and the other brother ended up deep into Mexico/Mexico City.