Who was Pablo Picasso's eldest child?

Olivier Widmaier Picasso is the son of Maia, daughter of Picasso's mistress, Marie-Thérèse Walter Marina and Bernard are the children of Paulo, Picasso's son with his first wife Olga Koklova. I don't know whether his children by another mistress, Francoise Gilot, Claude and Paloma, have any children.