Peel was one of the more unfortunate of the Quidditch players who was a participant in the 1877 Quidditch World Cup in Kazakhstan. Known as “The Tournament that Nobody Remembers“, Peel woke up with his knees on back-to-front and no memory of how it had happened (QWC).
Angelus is the Latin word for angel, and derives from the Greek word αγγελος (angelos), meaning "messenger" (Behind the Name).
Peel as a surname may derive from the French word pel (meaning "pole, boundary marker" or "tall, thin person") (Internet Surname Database). There are also several places and some famous people in Canada called Peel (Wikipedia).
It is not known whether Peel played for Canada in the re-staged tournament the following year - or whether his knees were ever the same again....
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From the Web
Writing by J K Rowling on WizardingWorld (Pottermore):
Writing by J K Rowling on Imgur (Daily Prophet coverage of the 2014 Quidditch World Cup, originally from Pottermore):
MuggleNet: Where Newt Got His Memory-Wiping Idea by hpboy13
Harry Potter Wiki: Angelus Peel