Final answer:
Holden has other siblings named D.B. and Phoebe.
Step-by-step explanation:
In addition to his brother Allie, Holden has other siblings. He mentions having a brother named D.B., who is a writer and lives in Hollywood, as well as a sister named Phoebe, who is ten years old.
Holden is the second child of Mr. and Mrs. Caulfield. He has an older brother named D.B., a war veteran turned writer; a younger brother named Allie, who died of leukemia at age 11; and the youngest Phoebe, who is about seven years younger than Holden.
Holden loves Phoebe, perhaps more than any other character in the story. He never speaks negatively about his sister. He wants to visit his sister as soon as he leaves Pencey, the school he was expelled from. She is the one person he truly wants to spend time with.
Allie died of leukemia at the Caulfields' summer home in Maine on July 18, 1946. He was 11 years old; Holden was 13. Holden, distraught over the loss of his brother, broke his hand punching the windows out of the garage of their summer home.