Brad and Kimberly Reveal Son's Name!

Brad Paisley and Kimberly Williams-Paisley paid tribute to a special man when picking a name for their newborn son, Jasper Warren Paisley, born April 17. Kimberly's rep told PEOPLE exclusively that Warren, the baby's middle name, is from Brad's grandfather who gave Brad his first guitar and encouraged him to pursue a music career. The couple also has two year old son, William Huckleberry Paisley, who was named after the Mark Twain character Huck Finn