What is the feminine form of the masculine form of names in mostly European cultures,  that consists of two main elements: the given name followed by family name that always follow the rules of the Lithuanian language?
Petraitis:  Its feminine forms are: Petraitienė (married woman or widow) and Petraitytė (unmarried woman). Lithuanian name:  Lithuanian names always follow the rules of the Lithuanian language.
Petraitienė