Why was the Kaiser Wilhelm Society renamed the Max Planck Society?

The Kaiser Wilhelm Society was renamed the Max Planck Society for the Advancement of Science in 1948 to honor the renowned German physicist Max Planck following his death in 1947.1

Planck, who originated quantum theory, served as the president of the Kaiser Wilhelm Society from 1930 to 1937. He was widely respected for his integrity and moral courage, notably attempting to intervene with Adolf Hitler to oppose the regime's destructive racial policies and striving to preserve the integrity of German science during a period of extreme political turmoil. Renaming the organization served as a tribute to his immense scientific contributions and his steadfast character.231