Isabella Clara Eugenia, infanta of Spain (born 1566)

Isabella Clara Eugenia, sometimes referred to as Clara Isabella Eugenia, was sovereign of the Habsburg Netherlands, and the Free County of Burgundy, from 1598 to 1621, ruling jointly with her husband Archduke Albert VII of Austria. After Albert's death, those regions were returned to the Spanish Habsburgs, and she continued to rule as governess of the Spanish Netherlands until her death.