What is "voisava"

Voisava ( 1402–05) was the wife of Gjon Kastrioti ( 1386–d. 1437), an Albanian nobleman with whom she had nine children, one of whom was the most powerful Albanian nobleman in history, regarded a national hero, George Kastrioti "Skanderbeg" (1405–1468). She is mentioned in passing in two sources from the start of the 16th century. The first source, a biography on her son, mentions her as the daughter of a "Triballian nobleman", which is interpreted as her being Serbian, modern scholars pointing to the Branković dynasty. Some Albanian historians claim that she was part of the Muzaka family. Her name is Slavic, as is several of her children's names.