Nicolaas George Wijnand Henri Beeger (born in Utrecht in 1884 and died in Amsterdam in 1965) was a Dutch mathematician. His 1916 doctorate was on Dirichlet series. He worked for most of his life as a teacher, working on mathematics papers in his spare evenings. After his retirement as a teacher at 65, he began corresponding with many contemporary mathematicians and dedicated himself to his work. Tilburg University still hold biennial lectures entitled the Beeger lectures in his honour.