How many children did Odysseus have?

When Achilles was sent by his mother Thetis to live as a transvestite, among the women at the court of King Lycomedes of Skyros, the king's daughter Deidamia discovered Achilles' true gender and became impregnated by him. The child of Deidamia and Achilles was Neoptolemus who fought at Troy after his father, Achilles, was killed. So, Neoptolemus is the name of Achilles' son.