One ruler of this name signed the Treaty of Senlis with Charles VIII and married off his daughter and
 grandson to Ladislaus II and Sigismund I.
One ruler of this name signed the Treaty of Senlis with Charles VIII and married off his daughter and
 grandson to Ladislaus II and Sigismund I. That figure lost his commander Heinrich von Fürstenberg on the
 battlefield of Dornach after the Gemeiner Pfennig tax portion of his Imperial Reform did not sit well with
 the Swiss. An abortive rescue attempt of another ruler with this name was led by Felix Salm-Salm; that
 ruler had his navy circumnavigate the globe under the Novara Expedition and married the daughter of King
 Leopold I of Belgium, later christened Carlota. A marriage of his son Philip to Joanna of Castile enabled a
 Holy Roman Emperor of this name to expand the Hapsburg line to Spain. For 10 points, identify this name
 also shared by an assassinated Emperor of Mexico.
One ruler of this name signed the Treaty of Senlis with Charles VIII and married off his daughter and
 grandson to Ladislaus II and Sigismund I.
{Maximilian} [prompt on {Max}]