Willem Jans Zwalve (born 7 September 1949) is a Dutch legal historian.
[1] In his youth he had an interest in studying ancient languages or history, but his father stated: "I don't want to subsidize hobbies".
[3] Zwalve obtained his PhD at the University of Groningen in 1981 with a thesis titled: "Proeve ener theorie der denegatio actionis : een onderzoek naar de positie van de magistraat in het Romeinse burgerlijke procesrecht", a work on Roman civil procedure.
[1] Zwalve was elected a member of the Royal Netherlands Academy of Arts and Sciences in 2009.
[4] German jurist Reinhard Zimmermann has described Zwalve's "Hoofdstukken uit de geschiedenis van het Europese privaatrecht" as a pioneering historical and comparative study.