Complex sentence: Her mother was the youngest of four children born to Johannes, Count of Königsegg-Aulendorf and Baroness Stephanie Waldbott von Bassenheim, herself a granddaughter of Archduke Friedrich, Duke of Teschen, through which Tierney is descended from the Habsburg-Lorraine dynasty.
Split into simpler sentences: Her mother was the youngest of four children born to Johannes, Count of Königsegg-Aulendorf and Baroness Stephanie Waldbott von Bassenheim. Through her grandmother, who was a granddaughter of Archduke Friedrich, Duke of Teschen, Tierney is a descendent of the Habsburg-Lorraine dynasty.