lussinatt

Etymology
From. The first part was a norwegianized form of the name, after the 4th century Sicilian martyr Saint Lucy. However, in Norwegian folklore, came to refer to a wight, who would wreak havoc on the night of the winter solstice, as in the Julian calendar which was used at the time, winter solstice fell on Saint Lucy's. Due to her oft malignant nature, some have proposed a connection to  as an etymological influence.

Either name is related to, ultimately derived from the root.

Noun

 * 1)  eve of, night before the Day of Saint Lucy, December 13th, in folklore thought to be the longest night of the year