Your mother's maiden name is the family name your mother had (i.e. the name from her father) before she married your father and took his family name (i.e. your family name).
Louise French
Cassatt's mothers full name was Katherine Kelso Johnston
maiden name
Matthew Langford Perry (his middle name is Langford because that was his mothers maiden name)
Gretchen Ludwig was her mothers maiden name
Dandle.
Maiden name is her last name before she married, right. If so, it's Beyonce. That's why Beyonce's name is that.
Ruby
Wassermann
DiGiorgio
Toomes.
Her name was Elena Fedorovona (maiden name)