Williams’s daughter Zelda Rae Williams is born in New York. She is William’s first daughter and first child with his second wife, Marsha Garces. She is named after the title character of the Nintendo game series Legend of Zelda. Her half-brother, Zachary Pym, is six years older than her. At a rented home in San Francisco, one of several residences where they live during her childhood, the family keeps rabbits and iguanas and Zelda has a personal miniature couch. On deciding to name his daughter Zelda:
It seemed only natural. When my wife was pregnant, my son Zachary mentioned that Zelda would be the perfect name for his new little sister … Zelda … What a great name … it’s magical, like she is!