One of the many things I love about my faith is that there are thousands and thousands of others who have lived it heroically and who have been recognized for doing so. We have the canonized (recognized by the Church) saints, the foremost of whom is Mary, the Mother of God. And we also have millions of other saints who lived holy lives and now reside in heaven but are not formally recognized by the Church. These can be our own relatives, friends, and loved ones who have lived by and upheld the Precepts of the Church, so in a way, you could ask your own dearly departed grandfather to intercede for you and become one of your patrons.
We usually have quite a few saints who are our patrons and patronesses: the saint who shares our given name, the saint we choose as our patron when we receive the sacrament of Confirmation, the saint who is the patron of our occupation or hobby, and others whom we look up to and strive to imitate. So my patron saints would be St. Margaret (there are many saints who share her name, but I particularly like St. Margaret of Cortona), St. Agnes of Rome (I chose her when I was confirmed), St. John Bosco (patron saint of editors), and several other favorites: St. Maria Goretti, St. Padre Pio, St. Thomas Aquinas, St. Augustine of Hippo… I could go on and on.
It is comforting to think about all your friends in heaven who can pray for you and whom you can call upon for help. I know that there have been many times when I have called on Sts. Agnes and Augustine and they have pulled through for me. It is also nice to know that every day on the calendar is the feast day of at least one saint, so there are always people in heaven watching over us as we walk through this valley of tears. 🙂