Because its the one of the most memorable names. For example, your mother takes your fathers name if they wed and so (unless you pretty much have no interest in your mother) you should know their maiden name. Also because if it were you surname that's easy, to track a mothers maiden name would mean searching through wedding records.
maiden name
Gretchen Ludwig was her mothers maiden name
Dandle.
Ruby
Toomes.
Wassermann
DiGiorgio
Her name was Elena Fedorovona (maiden name)
Abiah Folger
Leona lewis:)
faltisco i believe
Abodeelee