Jazzy - dead, skeleton - seems obvious.
From
Wikipedia, quote:The name Grateful Dead was chosen from a dictionary. According to Phil Lesh, in his biography (pp. 62), ...Jer[ry Garcia] picked up an old Britannica World Language Dictionary...[and]...In that silvery elf-voice he said to me, 'Hey, man, how about the Grateful Dead?' The definition there was the soul of a dead person, or his angel, showing gratitude to someone who, as an act of charity, arranged their burial. According to Alan Trist, director of the Grateful Dead's music publisher company Ice Nine, Garcia found the name in the Funk & Wagnalls Folklore Dictionary, when his finger landed on that phrase while playing a game of dictionary.[25] In the Garcia biography, Captain Trips, author Sandy Troy states that the band was smoking the psychedelic DMT at the time. The term Grateful Dead appears in folktales of a variety of cultures.
In the summer of '69, Phil Lesh told another version of the story to Carol Maw, a young Texan visiting with the band in Marin County who also ended up going on the road with them to the Fillmore East and Woodstock. In this version, Phil said, Jerry found the name spontaneously when he picked up a dictionary and the pages fell open. The words 'grateful' and 'dead' appeared straight opposite each other across the crack between the pages in unrelated text.
