Kat Oberle's birth name is Kathleen Oberle.
Kat Varga's birth name is Katalin Varga.
Kat Primeau's birth name is Kathryn Primeau.
Kat Bartlett's birth name is Kathryn Mary Bartlett.
Kat DeLuna's birth name is Kathleen Empatriz DeLuna.
Katarina Vasilissa's birth name is Ekaterina Vasilieva. "Ekaterina" is a common Russian given name, often shortened to "Katya" or "Katerina." "Vasilieva" is a patronymic surname derived from the father's first name, in this case, "Vasiliy." So, her full birth name would be Ekaterina Vasilieva, with "Vasilissa" likely being a stage or screen name.
Kat Carney's birth name is Katherine 'Kat' Carney.
Kat Slater's birth name is Christina Peters.
Kat Varga's birth name is Katalin Varga.
Kat Angus's birth name is Katie Angus.
Kat Bramston's birth name is Katherine A. Bramston.
Kat Cullen's birth name is Kathleen Cullen.
Kat Driscoll's birth name is Katherine Driscoll.
Kat Primeau's birth name is Kathryn Primeau.
Kat McKenzie's birth name is Katriona McKenzie.
Kat Green's birth name is Kathryn Greenblatt.
Kat Shoob's birth name is Katherine Elizabeth Shoob.
Kat Bartlett's birth name is Kathryn Mary Bartlett.