As for Zendaya’s siblings, she actually has five: two brothers and three sisters. They’re all older than her since they come from her father’s previous marriage.
Her oldest brother is Austin, who apparently also does some acting. Katianna is the second child and the oldest daughter. She already has kids of her own. The third is Annabella, who also already has kids. The fourth child is also the youngest son, Julien, while the fifth child is Kaylee, who made some appearances with Zendaya on the red carpet.
Not much is known about Zendaya’s siblings since they don’t have any public profiles. The actress is also known to be very protective of them and tends to not mention them a lot in interviews.
However, she does often say that many of the things she does on camera are for her little nephews and nieces since she wants to set a good example for them. Now, isn’t that sweet?