Complex sentence: In 1065, Ermengol married as his fourth wife Sancha, daughter of Ramiro I of Aragon by Ermessinda of Foix, and may have had daughter, Sancha, who married Hugh II of Empúries.
Split into simpler sentences: In 1065, Ermengol married as his fourth wife Sancha, daughter of Ramiro I of Aragon by Ermessinda of Foix. They may have had daughter, Sancha, who married Hugh II of Empúries.