The route of the Flight of the Earls, when the old Gaelic nobility left Ireland after being stripped of their lands by England, marking the end of traditional Gaelic society.

This
exodus actually resulted in some notable people down the line. Since
the people who fled were of noble birth, they were often afforded high
status in their new countries, and many rose to prominence

Their
legacy is strongest in Spain, where the O’Donnell clan was eventually
granted hereditary peerage as Dukes of TetĂșan, which they maintain to
this day. The current Duke of TetĂșan is Hugo O’Donnell. Also in Spain,
the O’Neill clan became a military family and were granted the title of
Marques Del Norte, which they also still maintain. The current Marques
being Carlos O’Neill. So both of these families still have noble status,
just not in Ireland.

Meanwhile in
France, the O’Brien clan became a prominent military family in the
country and eventually produced a president of France, Patrice de
MacMahon, who was a direct descendant of Brian Boru, a High King of
Ireland.

Then over in Austria,
another branch of the O’Donnell clan would achieve noble status and
eventually produce Count Maximilian Karl Lamoral O’Donnell, who famously
saved Emperor Franz Joseph I from an assassination attempt in 1853.