Common nicknames are informal or affectionate names given to people, often based on their given names, personality traits, or physical characteristics. For example, someone named William might be called Bill, while a Catherine could be affectionately referred to as Cat. These nicknames can vary by culture and region, reflecting local customs and language. Nicknames can also arise from hobbies, interests, or experiences. A person who loves basketball might be called Hoops, while someone known for their laughter could be nicknamed Giggles. These names often create a sense of familiarity and closeness among friends and family.