Gehazi was a servant of the prophet Elisha. When Elisha healed Naaman the Syrian of leprosy, Gehazi lied to Naaman in order to receive a large reward (2 Kings 5:20-24). Elisha confronted Gehazi over his deception and said:
Therefore the leprosy of Naaman shall cling to you and to your descendants forever.” So he went out from his presence a leper, like snow. (2 Kings 5:27)
So presumably Gehazi had some descendants who all suffered from leprosy. However, we have no information about who these people were, or when his line of descendants died out.