Madelung is a German surname. It is also the name of multiple terms in mathematics and science based on people named Madelung.
People Erwin Madelung (1881–1972), German physicist Georg Hans Madelung (1889–1972), German aeronautical engineer Otto Wilhelm Madelung (1846–1926), German surgeon Otfried Madelung (1922–2017), Germany solid-state physicist Wilferd Madelung (1930–2023), German-American author and scholar of Islamic history
Mathematics and science Madelung constant, chemical energy of an ion in a crystal, named after Erwin Madelung Madelung equations, Erwin Madelung's equivalent alternative formulation of the Schrödinger equation
Medicine Madelung's deformity, characterized by malformed wrists and wrist bones, and short stature, named after Otto Wilhelm Madelung Madelung's syndrome, also known as "benign symmetric lipomatosis", named after Otto Wilhelm Madelung