Complex sentence: There is so far no evidence that Infanta Antónia had ever renounced her rights of Portuguese succession, particularly because her husband in 1861 or later was not reigning monarch of any other monarchy, sovereign or otherwise.
Split into simpler sentences: There is so far no evidence that infanta Antonia had ever renounced her rights of Portuguese succession. Particularly because her husband in 1861 or later was not reigning monarch of any other monarchy, sovereign or otherwise.