Finley and Harper. Modern-day baby names or characters from a 1950s mystery novel?

Lisa Marie Presley has named her newborn twin daughters Finley and Harper, a rep for the singer revealed Monday. (Harper and Finley for girls? Really?)

The only daughter of Elvis Presley and her third husband, rocker Michael Lockwood, welcomed the girls by C-section at 2:46pm last Tuesday..

Both are healthy and tipping the scales at 5 lbs., 15oz., and 5 lbs., 2 oz.

Lisa Marie also has two children with ex-husband Danny Keough.