Your second engraving - one of the illustrations from the book "Martelaerspiegel", published in 1685 in Amsterdam. The author of these illustrations - Dutch artist Jan Luik (Jan Luiken, 1649 - 1712) . Reproductions of 104 illustrations for this book , visit :
http://www.bethelks.edu/mla/holdings...martyrsmirror/
including your engraving (from page 327 of Volume 2 ) , depicting the beheading of von Otterhayma in Cologne in 1560