How many times was the person who inherited Stanislovas Goštautas' possessions married?
Goštautai Goštautai (Lithuanian plural form), masculine Goštautas and feminine form Goštautaitė ("Polish" original, after Kasper Niesiecki - Gastoldowie, later transformed into Gasztołdowie) were a Lithuanian noble family, one of the most influential magnate families during the 15th and early 16th centuries. Their only serious rivals were the Kęsgailos, and from the end of the 15th century the fast rising in power and influence Radziwiłł family clan. It appears from the Latin original spelling of their name Gastoldus which is a variation of "castaldius" that they had been close to the Grand Dukes and that their function was to oversee ducal demesne. Most power family gained during the reign of Casimir Jagiellon. The castaldius of Vytautas, Andrius Goštautas might have been a voivode of Vilnius and Kreva, and father of Jonas, appears to have been the precursor of the family growth. The majority of the family's possessions (lands) were in the western part of the Duchy and eastern ethnic Lithuania. After the death of the last scion of the family, Stanislovas Goštautas, the Polish King and Grand Duke of Lithuania Sigismund II Augustus inherited his possessions as a matter of right, per Grand Duchy of Lithuania law.
Kumankata The name of the Cuman noblewoman who subsequently married two Tsars Emperors of Bulgaria, Kaloyan of Bulgaria and Boril of Bulgaria, is unknown. There are only two sources mentioning her, both foreign. The Byzantine historian George Akropolites claimed that after the death of Kaloyan, his sister's son Boril 'married his Scythian aunt'. From this evidence, it is not sure whether the Tsaritsa was really a Cuman, or she belonged to another tribe that could be described as Scythian. As Veselin Ignatov points out, given the strong relations between the Asen dynasty and the Cumans, her Cuman lineage is the most probable possibility, but not the only one. She is known in Bulgarian historiography as Kumankata (Bulgarian: Куманката , "the Cuman [woman]").