Powell's grandfather was a flamenco guitarist, and his father was a stride pianist. The family lived in New York City. His older brother William played the trumpet, and by the age of fifteen Powell was playing in his brother's band. Powell had learned classical piano from an early age, but by the age of eight was interested in jazz, playing his own transcriptions of Art Tatum and stride pianists Fats Waller and James P. Johnson. Younger brother Richie was also an accomplished pianist, as was schoolfriend Elmo Hope. Thelonious Monk was an important early teacher and mentor, and a close friend throughout Powell's life, dedicating the composition "In Walked Bud" to Powell. In the early forties Powell played in a number of bands, including that of Cootie Williams, and in 1944 his first recording date was with Williams's band. This session included the first ever recording of a tune by Monk, "'Round Midnight". Monk also introduced Powell to the circle of bebop musicians starting to form at Minton's Playhouse, and other early recordings included sessions with Frank Socolow, Dexter Gordon, J. J. Johnson, Sonny Stitt, Fats Navarro and Kenny Clarke. In the early years of bebop, Powell and Monk, as the first great modern jazz pianists, towered over their contemporaries, Al Haig, Ralph Burns, Dodo Marmarosa, and Walter Bishop, Jr.