Who is Confucius' son?

The name of Confucius' son is Kong Li. When he was born, Duke Zhao of Lu specially sent a big carp to congratulate him, so Confucius named his son Kong Li. Before Kong Li died of Confucius, he lived a mediocre life. Because he was the son of a saint, he was named "Hou of Surabaya" by Song Huizong, and the descendants of Confucius were honored as "the second ancestor". Kong Ji, the son of Kong Li, inherited and developed Confucius' theory and wrote Confucian classics such as The Doctrine of the Mean. Therefore, he was named as "the sage of solving the state" by Yuan Di, and the descendants of Confucius were honored as "the third ancestor".