Yes.

According to Jain tradition, Bhagwan Mahavira had two elder siblings:

• Elder brother: Nandivardhana
• Elder sister: Sudarshana (also written as Sudarśanā)

Mahavira (Vardhaman) was the youngest child of his parents, King Siddhartha and Queen Trishala.

You can read a simple outline of Mahavira’s life here