The name Marilla is a girl's name of Latin origin. Marilla and is often added to lists like Cool Girl Names from Ancient Cultures and discussed in our forums with posts like "Names on NB that make you go WOW!".
From the experts:
Marilla is a names that's familiar via its resemblance to Mary and variations, but also distinctive: It hasn't been on the Top 1000 since the 1800s and was given to only nine baby girls last year. Delicate and sweet, which began life as a short form of the flower name Amaryllis. Marilla Cuthbert was a character in L. M. Montgomery's Anne of Green Gables.
Not heard much since the 1880s, Marilla could make a distinctive alternative to Marissa.