What was the name of Duryodhana's son?

Duryodhana’s son was named Lakshmana, also called Lakshmana Kumara.

Lakshmana was a Kaurava prince and a warrior on his father’s side during the Kurukshetra War. The Mahabharata gives him less attention than major figures such as Duryodhana, Karna, or Bhishma, but it identifies him as Duryodhana’s son and records his participation in the fighting.

On the thirteenth day of the war, Lakshmana confronted Abhimanyu, the son of Arjuna and Subhadra. Abhimanyu ultimately killed him by decapitating him with an arrow. Duryodhana’s grief and anger over Lakshmana’s death contributed to the Kaurava warriors’ decision to attack Abhimanyu together after he became trapped inside the chakravyuha formation.

A frequent source of confusion is the name Lakshmanaa, a daughter associated with Duryodhana in later or Puranic traditions. Dushasana was Duryodhana’s brother, not his son. Ghatotkacha was Bhima’s son, while Abhimanyu was Arjuna’s son. Thus Lakshmana is the canonical answer for Duryodhana’s son in the Mahabharata.