the mom dies
Something missing from this list?
A Dog of Flanders
The mother dies in the beginning sequence, leaving her son in his grandfather's care.
We don't know her or see her alive, but her death starts the movie. She makes cameos as a ghost.
The mom, the child and fluke die.
Gone With The Wind
The protagonist's mother dies of illness while she is away, the secondary female lead dies in childbirth, leaving her other son an orphan.
A teenage boy's mom is stabbed and dies.
The movie opens with the funeral of Babydoll's and her child sister's mother. Other characters are orphans as well.
The Ones Below
The mother/wife living upstairs "commits suicide" (is murdered) at the end.
The Witch (2016)
She is murdered on screen with blood but not Evil Dead or Tarantino levels of blood.
The mom dies at the beginning of the movie.