The tradition of serving ham for Christmas is older than you thought, going all the way back to Germanic pagans feasting on wild boar during Yuletide. Thankfully there's no need to go hunting boar ...

Iberian ham, or jamón Ibérico ... Black Iberian pigs descend from wild boars and have been considered a delicacy since long before our times. In the year 77, Roman writer Pliny the Elder ...