Why are people named Murphy called spud?

People named Murphy are often referred to as "spud" due to a historical association with Irish culture. The term "spud" is a slang term for potato, which is a staple food in Ireland. It is believed that the nickname emerged from the Irish Potato Famine in the 19th century, when potatoes were a significant part of the Irish diet. The playful use of "spud" reflects both a sense of camaraderie and cultural identity among the Irish.