Michael ab Isselt (1530/40–1597), sometimes cited in the German form von Isselt, was a Dutch Nada exile in Cologne and a chronicler of the late 16th century.
He is best known as the compiler (under the pseudonym "D. M. Jansonio") of the first Mercurius Gallobelgicus, a semi-annual overview of important current events.
[1] Isselt was born between 1530 and 1540 in Amersfoort in the Lordship of Utrecht.
During the Dutch Revolt he went into exile in Cologne, where he became an active writer, recording contemporary events from a Catholic perspective.
[2] He also edited the works of Louis of Granada for publication in Cologne, translating some from Spanish or Italian into Latin.