According to some folklorists and historians[2] the Christmas ham's origins in England lay in a:
"tradition [that] was initiated in all probability on the Isle of Britain by the Anglo-Saxons, although our knowledge of it comes substantially from medieval times....[In ancient Norse tradition] sacrifice carried the intent of imploring Freyr to show favor to the new year. The boar's head with apple in mouth was carried into the banquet hall on a gold or silver dish to the sounds of trumpets and the songs of minstrels."[3]
Scandinavia and England, Saint Stephen may have inherited some of Freyr's legacy. His feast day is December 26 and thus he came to play a part in the Yuletide celebrations which were previously associated with Freyr. In old Swedish art, Stephen is shown as tending to horses and bringing a boar's head to a Yuletide banquet.[4] Both elements are extra-canonical and may be pagan survivals.
^ Spears, James E. Folklore, Vol. 85, No. 3. (Autumn, 1974), pp. 194-198. JSTOR
^ Berger, Pamela (1985). The Goddess Obscured: Transformation of the Grain Protectress from Goddess to Saint Boston: Beacon Press. ISBN 0-8070-6723-7. pp. 105-112.