Short answers, pulled from the story.
Wander Johannes de Haas was a Dutch physicist and mathematician born on the 2nd of March 1878 in Lisse, Netherlands, who died on the 26th of April 1960. He is best known for the Shubnikov-de Haas effect, the De Haas-Van Alphen effect, and the Einstein-de Haas effect.
Three physics phenomena bear de Haas's name: the Shubnikov-de Haas effect, the De Haas-Van Alphen effect, and the Einstein-de Haas effect. Each is a distinct phenomenon studied in the physics of materials under extreme conditions.
De Haas married Geertruida Luberta Lorentz on the 22nd of December 1910. She was a physicist and the eldest daughter of the celebrated Dutch physicist Hendrik Lorentz. Together they had two daughters and two sons.
De Haas studied physics at the University of Leiden starting in 1900, under Heike Kamerlingh Onnes and Johannes Petrus Kuenen. He earned his doctorate in 1912 under Kamerlingh Onnes, with a thesis on measuring the compressibility of hydrogen.
After his doctorate, de Haas worked at the Physikalische Reichsanstalt in Berlin, then returned to the Netherlands as a schoolteacher in Deventer, a conservator at the Teylers Museum in Haarlem, and a professor at Delft Technical School and the University of Groningen. In 1925 he became a professor at Leiden and co-head of its physics laboratory, succeeding Kamerlingh Onnes.
In 1942, de Haas was forced to resign from the Royal Netherlands Academy of Arts and Sciences, which he had joined in 1922. After World War II ended in 1945, he was permitted to rejoin as a member. He retired in 1948.