In the story of The Princess Bride, Domingo is Inigo's father. He's an extremely impoverished but secretly talented sword maker who lived in the mountain village of Arabella, Spain. Inigo idolized his father as a boy, though the narrator notes that Domingo wasn't particularly generous or kind to his son. Domingo made most of his money as a repairman but about once per year, an old friend and fellow sword maker, Yeste, would arrive from Madrid and ask Domingo for help making something particularly difficult. Domingo always said yes after some arguing, though he didn't find any of Yeste's commissions especially challenging. The last sword that Domingo made was a six-fingered sword for Count Rugen. The process took a year and when Count Rugen returned for his sword, he refused to pay for it, deemed the sword unworthy, and killed Domingo. Inigo has spent the rest of his life learning to fence so in order to kill the six-fingered man and avenge his father's death.