Paul McCartney has always used his middle name. What is his real first name?

The real first name of Paul McCartney is James. He has always used his middle name in his professional career as a musician, which has become more well-known to the public. It is common for individuals, especially in the entertainment industry, to adopt a stage name or use their middle name for various reasons, such as personal preference or uniqueness. In Paul McCartney's case, he likely chose to use his middle name to differentiate himself and establish his own identity as a singer-songwriter, rather than being known solely by his given first name.