Notable people with the surname include:       Gründtliche Beschreibung der Kunst des Fechtens  Gründtliche Beschreibung der Kunst des Fechtens or, in English: A Foundational Description of the Art of Fencing: "A Thorough Description of the Free, Knightly and Noble Art of Fencing, Showing Various Customary Defenses, Affected and Put Forth with Many Handsome and Useful Drawings" is a German fencing manual that was published in 1570. Its author was the Freifechter Joachim Meyer. This manual was made for and was dedicated to Meyer's patron Count Palatine Johann Casimir. This "fechtbuch" builds on his earlier work, a manuscript written in 1560 - the MS A.4°.2, and presents a complex, multi-weapon treatise. Meyer's complete system often marks the end of and the compilation of the German fencing system in the Johannes Liechtenauer tradition. It is the only fechtbuch in the Liechtenauer tradition that was written for both laymen and beginners of the art. The first edition of "Gründtliche Beschreibung der Kunst des Fechtens" was published in 1570 in the city of Strasbourg. It was printed just a couple months before Joachim Meyer's death in 1571. After Meyer's death, his widow, Appolonia Ruhlman, republished the manual in order to gain money to pay back the 1300 crown debt that Meyer had incurred over the writing and publishing of his fechtbuch. In 1600, Meyer's widow republished the book in Augsburg, Germany. According to some sources, the book may have been republished in 1610 and again in 1660, but so far only the 1570 and 1600 editions have been recovered. The treatise contains five books within its 379 pages. Book 1 - Longsword Book 2 - Dussack Book 3 - Side sword or rapier Book 4 - Dagger Book 5 - Staff and pole arms       Jaap van Velsen  Jaap van Velsen (28 September 1921 – 6 May 1990) was a Dutch-born British anthropologist. Van Velsen was born in Soerabaja as the son of Wilhelmina Louisa Metzelaar and Abraham van Velsen, a businessman at the time and later a politician with a focus on culture.