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*In 1833, Spain's King Ferdinand VII, dying without a male heir, named his daughter Isabella as monarch of Spain. His younger brother Carlos opposed this decision, and his supporters fought two civil wars in a futile effort to put a Carlist king on the throne. The feud still continues among Spanish monarchists, with Carlists backing Irene's husband, and anti-Carlists the far more likely pretender Don Juan, a descendant of Isabella.