The Galliard family is an Eldian family living in Liberio under the rule of the Marleyan government. It is the family where Porco and Marcel Galliard and hail from.
History: At a young age, Marcel and Porco joined the Marleyan military to become Warriors. They were both certified Warrior candidates and were shortlisted to receive the Power of the Titans. Marcel was a candidate for the Jaw Titan and inherited it from his predecessor, while Porco was a candidate for the Armored Titan, but Reiner Braun obtained it rather than him.
Story: Porco, in his Titan form, fights at the battle of Fort Slava. After Marley wins the war, Porco gets back to Liberio and sees his parents again. Following the battle of Fort Slava, Galliard watches over Reiner as he recovers from his injuries following the battle.
Source: Galliard family (Anime), available under CC BY-SA 3.0.