"Semper fidelus."

-Selwyn family motto, meaning "always loyal" in Latin

Selwyn is the surname of an old wizarding family. They were once pure-bloods, but Calesca Days married a half-blood wizard Orion Days, thus producing half-blood children. The Selwyns are a mix of houses, including Slytherin, Ravenclaw and Gryffindor at Hogwarts. They are very wealthy, having a substantial amount of gold in their Gringotts volt.

During the First and Second Wizarding Wars, the Selwyns were split up. Alsius Selwyn was a Death Eater, but his sister Calesca Days, having been in Ravenclaw away from the influence, didn't fight in the first war. In the second war, she had married Orion Days, and fought with him and his family.

Known membersEdit

Family treeEdit

       _______________              ________________________________
      |               |            |               |                |
Alsius Selwyn    Calesca Days  - Orion Days    Pierrette Days   Alexa Days 
                    Marvell Orion Days  - Ramona Days 
                              |                    |
                       Kasia Alexa Days    Anelia Pierrette Days

Gallery of membersEdit

Recent family historyEdit

First Wizarding WarEdit

Alsius Selwyn and Calesca Days both attended Hogwarts prior to the First Wizarding War, and straight after leaving, Alsius became a Death Eater, and Calesca didn't, and went into hiding when the war began. There, she met her old highschool sweetheart, Orion Days, who was a half-blood wizard. They got married, much to the disapproval of Calesca's brother. After the war, Alsius was captured and sent to Azkaban. Calesca and Orion had a child two years after the War began, Marvell Orion Days, and went into hiding during the war.

Second Wizarding WarEdit

Alsius Selwyn broke out of Azkaban with the other Death Eaters in the mass break out. Alsius disapproved of his sister's child so much that he retaliated in murdering Orion's sisters, Pierrette and Alexa Days. Marvell Days was so furious that he murdered his own uncle. Calesca and Orion Days also fought against the Death Eaters.

After the WarEdit

Calesca and Orion Days lived peacefully after the war, and Marvell Days married a Muggle, Ramona Days, and they had two children, Kasia and Anelia.

Next generationEdit

Marvell Days only told Ramona Days that he was a wizard after their second child was born, knowing that it was better sooner rather than later. Ramona was furious with him for not telling her, and kicked him out. Ramona later told her children that he died of cancer, and they did not question this. When Kasia began showing magical abilities, Ramona didn't treat her fairly, and when Kasia was bitten by a werewolf, Ramona disowned her, both because of the danger and that werewolves had an affliation with magic.

Kasia Days lived with the Wood family, and went to Hogwarts and was Sorted into Gryffindor. The next year, her sister came to Hogwarts as well, and Kasia deduced that her father had been magical. She set out to find out him, and eventually came across an article about Alexa and Pierrette Days being murdered by Selwyn. Kasia met her father the year after, when Anelia found some letters he'd been sending, that Ramona had hidden.

Kasia also meets her grandparents, Calesca and Orion Days.

Family heirloomsEdit

  • Selwyn locket - silver locket with purple Alexandrites and engraved with the Selwyn motto: Semper Fidelis (meaning "always loyal") owned by Calesca Days.
  • Silver pocketwatch - silver and purple, with the Selwyn crest (purple and silver with a panther) owned by Marvell Days.
  • Selwyn ring - silver with a purple Alexandrite, owned by Ramona Days as a wedding ring.

Distinguishable traitsEdit


Selwyn is an uncommon surname of Anglo-Saxon origin derived from the words sel, "castle", and wyn, "friend". It is also the name of a mountain range in the Canadian Rockies, and a Cambridge College.


  • Dolores Umbridge claimed to be related to the Selwyns, lying about how she obtained the Horcrux locket