Early Baroque composer from Nuremberg, best known for his still widely performed Canon in D. Twice, he served as tutor to members of the Bach family (including J.S. Bach's elder brother J.C. Bach, but apparently never J.S. himself), and godfather of J.S. Bach's sister Johanna Jaditha Bach.
Here is the famous Canon, conducted (beautifully as always) by Sir Neville Marriner, leading the Academy of St. Martin's in the Fields.
Pachelbel should be better known for his other works as well, especially his wonderful pieces for organ, including this short Fantasia (which Bach studied):