William Lawes (1602–1645) was an English composer and musician. Lawes was born at Salisbury in Wiltshire and was baptised on 1st May 1602. He was the son of Thomas Lawes, a vicar choral at Salisbury Cathedral, and brother to Henry Lawes, a very successful composer in his own right. His patron, Edward Seymour, Earl of Hertford, apprenticed him to the composer John Coprario, which probably brought Lawes into contact with Charles, Prince of Wales at an early age. Both William and his elder brother Henry received court appointments after Charles succeeded to the British throne as Charles I.