What is the name of the great founder of international law?

The great founder of international law is often considered to be Hugo Grotius, a Dutch jurist and philosopher. His seminal work, "De Jure Belli ac Pacis" (On the Law of War and Peace), published in 1625, laid the foundations for modern international law by emphasizing the importance of natural law and the rights of nations. Grotius's ideas significantly influenced the development of legal principles governing war, peace, and diplomacy.