I added Charles I, which I thought was an obvious if not the most famous example, before I saw that this project was meant to exclude English beheadings. The project for English beheadings only has one profile, so it seems more sensible to merge the two projects.
This other project has 130 profiles, however. I guess execution might not be the same as beheading.
http://www.geni.com/projects/People-executed-on-order-of-English-mo...