Gelert is a legendary wolfhound associated with the village of Beddgelert in Gwynedd, north-west Wales. In the legend, Llywelyn the Great returns from hunting to find his baby missing, the cradle overturned, and Gelert with a blood-smeared mouth. Believing the dog had devoured the child, Llywelyn draws his sword and kills Gelert. After the dog's dying yelp, Llywelyn hears the cries of the baby, unharmed under the cradle, along with a dead wolf which had attacked the child and been killed by Gelert. Llywelyn is overcome with remorse and buries the dog with great ceremony, but can still hear its dying yelp. After that day, Llywelyn never smiles again.

The Irish Wolfhound is a breed of large sighthound that has, by its presence and substantial size, inspired literature, poetry and mythology. One of the largest of all breeds of dog, the breed is used by coursing hunters who have prized it for its ability to dispatch game caught by other, swifter sighthounds. In 1902, the Irish Wolfhound was declared the regimental mascot of the Irish Guards.