The last name at your parent's birth refers to the family name inherited from their parents.
No, it is the name your parents gave you at birth, for example, Joan or Sean.
In the US, parents who sign the birth certificate can name the child anything they like.
James Last's birth name is Last, Hans.
her parents last name was Ludwig
Brenda Last's birth name is Brenda Mary Last.
The parents last name is Green
Nella Last's birth name is Nellie Lord.
Mother's given name means, your mother's first name... That is, the name she was given at birth by her parents, and as opposed to her surname, (family name, last name.)
Your first name is the name given to you at birth most likely by your parents (the name that close friends and family would call you by). Your last name is your family name, the last name of your parents (unless you chance it though marriage).
Your last name is normally inherited from your parents.
Natalia Nikolaevna Zakharenko. She was called Natasha though and several years after she was born her parents changed their last name to Gurdin.
Her parents named her Katheryn.