are aerial spirits and daemons among the northern tribes, especially the Laplanders, to whom divine adoration is paid. They suppose them to dwell under particular trees, and proceed thither to offer up sacrifices once a year, at Christmas time, whence the name of the Christian festival corresponds to their Jul (q.v.). See Broughton, Biblioth. hist. Sacra, s.v.; Thorpe. Northern Mythol. 2, 49 sq.