What was the names of the two old ladies who raised the Grinch in the how the Grinch stole Christmas?

The two old ladies who raised the Grinch in "How the Grinch Stole Christmas" are known as "Mama Who" and "Grandma Who." They are part of the Whoville community and play a significant role in the Grinch's backstory and character development. Their nurturing and caring nature contrasts with the Grinch's initial bitterness and resentment towards Christmas.