Angharad is Huw's oldest sister. She is in love with the local pastor but marries Iestyn Evans, a rich man, who she doesn't love.
Ceridwen is older than Huw. Unlike her older sister, she is happily married to Blethyn.
Olwen Morgan is Huw's little sister. She was born while Huw and his mother were both bed-ridden. Over the course of the story, Olwen comes to live with Huw and Bronwen, becoming an important part of their small family.
How Green Was My Valley