Tiffauges mentions "Bluebeard" as an ancestor when he threatens Lucas. Bluebeard is a fairytale about a man who murders multiple wives. It was written by Charles Perrault, who supposedly based Bluebeard on the real-life Gilles de Rais, a monster who lured children to his castle and murdered them. de Rais' castle is known as Château de Tiffauges. Possibly this ancestral "reference" in the episode is meant to explain the Tiffauges' willingness to kill 3 women and potentially harm Mark.
McCain mentions that his ranch is 4,100 acres.