Siebenschläfer

Etymology
From, referring to the Seven Sleepers. Univerbation since the 15th century. Use for “one who sleeps a lot” since the 17th century. The biological sense since the 18th century because of the animal's hibernation, which may last more than seven months.

Noun

 * 1)  edible dormouse
 * 2)  (one of) the
 * 3)  Seven Sleepers Day, June 27
 * 4)  sleepyhead, one who sleeps a lot or rises late
 * 1)  sleepyhead, one who sleeps a lot or rises late