Number of Brontë sisters or Karamazov brothers

I believe the answer is:

three

(Other definitions for three that I've seen before include "III" , "Sixth root of seven hundred and twenty nine" , "Number of strikes before you're out" , "Number constituting a crowd?" , "Small number that still makes a crowd?" .)

I've seen this clue in The New York Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.