@lanodan @kaia This AFAIK holds for most states in Europe: definitely Czechia, Slovakia, Ukraine; almost surely also for Germany and Poland; Netherlands is a kingdom though. Finland has no king, it is a republic…
The other thing is, who is the most influential person w.r.t. executive power. And this is not straight forward either, because for Czech, the President is IIRC part of the executive power, but de facto the power lies on the Government lead by the Prime Minister…