Boar's Head Carol

There are many versions of the Boar's Head Carol, including one with a Latin line about always serving the boar with mustard. In antiquity the fierce boar was worthy of respect. Adonis, who died in Aphrodite's loving arms, was killed by a boar that might have been sent by a jealous Ares. Atalanta was accorded honor for being the first to hit the Calydonian Boar. The Norse fertility brother and sister god and goddess Freyr and Freya each had a boar and a boar was sacrificed to Freyr at the Winter Solstice.
Here is a familiar version (from a publication by Thomas Wright in 1841) of the Boar's Head Carol that was first published in 1521, with translation of the Latin.

Atalanta | Calydonian Boar Hunt | Artemis and the Calydonian Boar
Adonis and Aphrodite