Of Huw Morgan's sisters, Angharad is the eldest. Angharad is a troubled sister who is in love with the local pastor, but ends up marrying Iestyn Evans, a wealthy man whom she does not love. She suffers considerably from the situation and ends up leaving the area for good.
Ceridwen, also older than Huw, marries happily and except for her marriage to Blethyn, and her role in the Morgan household, is not given a lot of attention in the story.
Olwen Morgan is Huw's younger sister who was born while Huw and his mother were both bed-ridden. At the end of Huw's story, Olwen is still alive. Olwen comes to live with Huw and Bronwen when she is young, and forms part of their unusual small family.