Mendiola was born in Dubai, where her father used to work. She is the second of three siblings of a Filipina mother and a Lebanese - British father. [dead link] She was three years old when her mother moved and brought her and her elder sister Pamela to the Philippines. Her mother left her father due to his infidelity. Jessy's younger sister Megan was born in Mexico, where her parents reconciled but eventually separated again for unknown reasons. She remains in contact with her father, who works overseas as a marine anthropologist. She studied mass communication at Far Eastern University.