How did Jimmy Page get his name?

Jimmy Page was born James Patrick Page.

In his early years as a session guitarist, he was known as 'Lil' Jim Pea' to prevent confusion with the other noted English session guitarist Big Jim Sullivan. Page was mainly called into sessions as "insurance" in instances when a replacement or second guitarist was required by the recording artist. "It was usually myself and a drummer", he explained, "though they never mention the drummer these days, just meĀ ... Anyone needing a guitarist either went to Big Jim [Sullivan] or myself." Later in his career, he took the stage under his given name, Jimmy Page.