SBS volume 38 chapter 361 page 86
ODA: There are several different accounts, but in general there was a lying, no-good pirate named Davy Jones, a greedy deck chief who was famous for putting all the crew's valuables in his own locker. He was so wicked, even for a pirate, that one day the Devil himself cursed Davy to live at the bottom of the sea forever, swabbing the deck of a sunken ship and placing all the sunken treasure into his locker, where it would never be seen again. So when pirates say "Put 'im in Davy Jones' locker!!" it means "sink 'im to the bottom o' the sea!!"
Yes, DAVY JONES EXISTS IN THE MANGA... now he has actually been canonized