Leo Gursky is a fictional character from the novel "The History of Love" by Nicole Krauss. He is an elderly Jewish man living in New York City, originally from Poland. Leo is a writer who struggles with loneliness and the passage of time, reflecting on his past and lost love. Throughout the story, Leo's life intertwines with that of a young girl named Alma, who discovers a book he wrote many years ago. The narrative explores themes of love, memory, and the connections between people across generations, highlighting Leo's enduring hope and desire for connection.