William Tapia (January 1, 1908 – December 2, 2011), known as "Uncle Bill" and "Tappy", was an American musician, born to Portuguese parents. At age 8, Tapia was already a professional musician, playing "Stars and Stripes Forever" for World War I troops in Hawaii. He continued to perform and record at an advanced age, all the while remaining in vigorous health and driving a car until his 100th birthday when he began suffering eyesight problems. Tapia was a featured performer in Mighty Uke: The Amazing Comeback of a Musical Underdog, a 2010 documentary on the ukulele.