William Byrd the 16th century composer was born in England. William Byrd I, the Virginian planter and slave owner was born in England, his son William Byrd II was born in Virginia, as was his grandson William Byrd III who fought in the French and Indian War. So take your pick.
William Byrd III was born on 1728-09-06.
William Walker - composer - was born in 1809.
William Boyce - composer - was born in 1711.
William Gardiner - composer - was born in 1770.
William Ross - composer - was born in 1948.
William Schmidt - composer - was born in 1926.
William Wordsworth - composer - was born in 1908.
William Parsons - composer - was born in 1745.
William Sweeney - composer - was born in 1950.
William Smith - composer - was born in 1603.
William Harper - composer - was born in 1949.