February 17 » In Sweden February 17 is followed by March 1 as the country moves from the Julian calendar to the Gregorian calendar.
May 1 » Publication of Species Plantarum by Linnaeus, and the formal start date of plant taxonomy adopted by the International Code of Botanical Nomenclature.
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The Family tree De Leeuw publication was prepared by Willem de Leeuw (contact is not possible).
When copying data from this family tree, please include a reference to the origin: Willem de Leeuw, "Family tree De Leeuw", database, Genealogy Online (https://www.genealogieonline.nl/de-leeuw-stamboom/I1074001482.php : accessed June 14, 2024), "Lubbert Willems van der Weerd".
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