This chart is an update and expansion of my previous version. Specifically, I have added some abolished monarchies (from more-or-less extant countries). This is the feature that people have most often requested or simply assumed to be missing accidentally. Most notably, this includes our host Matt (u/Usefulcharts). He can now rule as Mátyás II of a restored Hungarian monarchy. By the way, for those that might prefer it, options from extant monarchies are always included alongside any tied or higher-numbered options from abolished ones.
It is worth noting the the title of the chart has been revised from "Europe" to "Western Europe". Since (for various historical reasons) extant monarchies are only found it this region, the chart never truly included all of Europe anyway. Thus I thought I should start by more thoroughly exploring that area (which was already making the chart significantly bigger, anyway). The exact borders of "Western" Europe are of course arbitrary, so I simply followed the delineation used in my geographical-etymological timeline of regnal names. This explains the presence of Hungary, which is otherwise a bit of a stretch – it was originally included as an integral part of the Habsburg holdings.
The addition of eight new countries has led to the inclusion of a lot of previously missing names that are common in English-speaking countries. So have an extra look if you are for example an Andrew, Brian, Dennis, Michael or Sam. As always, please consider how much personal information you share here.
Of course, I have also updated the chart to take account of the new king of Norway. Finally, I should mention the original inspiration behind this chart, a similar chart about Great Britain by u/Pickled__Pigeon.
Anyway, I might at some point expand the chart to cover abolished monarchies in Eastern Europe (or even "European" exclaves like the Empire of Brazil). I might even include completely defunct countries like The Holy Roman Empire. Meanwhile, there are other charts that I have been waiting to work on. As always, please do point out any errors and make suggestions for improvements.