Remus Sanders (a character in Thomas Sanders “Sanders Sides” franchise) as well as Remus Lupin in J. K. Rowling’s Harry Potter books. Both amazing, btw.
The problem with the name Remus is its association with the character of Uncle Remus in American folklore, frequently seen as racist. However, as indicated in other comments, the odds are that more people these days will associate it with Remus Lupin.
In mythology, Remus and Romulus were brothers adopted by a wolf. JK Rowling has cleverly portrayed the character of Remus J Lupin as a wolf-cum-human in her third book.
Remus Lupin, a werewolf from the Harry Potter series. Interestingly the name is also that of an ancient werewolf-ish person, Remus, the brother of Romulus, who was raised by wolves.