Lyall Lupin

Lyall John Lupin (1929 - 2032) was a half-blood wizard renowned for his knowledge of Non-Human Spirituous Apparitions. He married the muggle, Hope Howell and together they had their only son, Remus Lupin, who would transform into a werewolf after being attacked by Fenrir Greyback for comments that Lyall made about the race of people.

Biography
Lyall was born a half-blood wizard, and attended Hogwarts School of Witchcraft and Wizardry as a Gryffindor. In his later years, he worked in the Ministry of Magic as an employee of the Department for the Regulation and Control of Magical Creatures. He was also renowned for his grandeur of taking care of spiritual beings such as Boggarts.

One day, at the age of thirty, Lyall heard screaming coming from a dense forest, where he met a woman cowering before a scarily tall, evil looking man. He quickly got rid of him, and soon they fell in love, and married less than a year after. The year after their marriage, they had a son named Remus John Lupin, named by a Naming Seer.

Nearly five years after his son's birth, he made a rude comment about werewolves that reached publishing from the Daily Prophet. Soon that evening, they were visited by the ferociously infamous Fenrir Greyback, who bit Remus on the full moon, contaminating him with the curse of the werewolf. Over the next six years, the family would move around the country every time their neighbors got wise about the fact that their son was a werewolf.

Lyall, like his wife, was worried that Remus would not be accepted in Hogwarts. Fortunately, however, Albus Dumbledore reassured them that provisions will be put in place so the Remus will not be able to hurt any of the other students.

In the First Wizarding War, Lyall's wife, Hope died at the hands of a Death Eater. While he tried to stand by and guard, he was hit by a Stunning Spell and was helpless.

Later in his life, he attended Remus' small marriage ceremony to Nymphadora Tonks. He then was notified of his only grandson, Teddy Lupin's, birth. He even attended Teddy's wedding to Victoire Weasley, but died shortly after.

Etymology

 * Lyall is a surname derived from the scottish given name, "Liulfr," meaning "wolf"
 * It could be that Lyall was named after his mother's surname
 * Lupin is based on the latin word "lupinus," meaning wolf-like