Frederick Gibbons was a farmer and member of the Gibbons family. He became trapped (along with his wife Victoria, father-in-law Patrick and his son Steven) in the Cranberry Island Bog bunker after the machinery controlling the door was broken. He can be found and fought if the Sole Survivor fixes the machinery and opens the bunker door.
Missing from the bunker is his daughter Eliza Gibbons, who was off to a Halloween party when the bombs fell. In addition, Nathaniel Gibbons, his other son, went missing before the bombs fell, though it was not uncommon for him to be gone a lot.