I can help you. What is your father's name? Who is the oldest Herrero in your family alive? Talk to that person to get more information about your Herrero family. Who has the birth certificate of your father, your grand father and your great grand father? Talk to all members in your family. You need to get the genealogy software so it will make easier for you to keep track all the information you can get.
Remember that HERRERO family came from a small town called HERRERO in Spain. Herrero family used to own a iron factory and they were Nobel in Spain.
You can ask me anything and I will be more than happy to help you