We’ve heard of godparents in the Harry Potter series. One obvious example is Sirius Black being Harry’s godfather, who spent much of his time in Azkaban. Harry is also named Remus’s son, Teddy’s, godfather. Ron and Hermione are godparents to Harry’s oldest son, James, in the seventh book’s epilogue, as well as his aunt and uncle, of course.
But they seem to serve more as mentors or other helpful adult figures rather than religious sponsors, which is what godparents really are in real life. It’s actually a common misconception for godparents to be guardians in the events something happens to their godchildren’s parents, although parents can still grant them legal withstanding. It’s rare, though, and rarer for kids to live with their godparents.
That idea can be true if something happens to the parents, yet the kids are over 18, but don’t have enough money or jobs to support themselves financially. They could probably stay with their godparents, and the godparents can likely even take them in. They could probably adopt their overage godchildren, as well. Yes, people can adopt young adults in real life.
Anyway, religion does not play a huge role in Harry Potter. Yes, wizards and witches celebrate Christmas and Easter. J.K. Rowling has also revealed that there are Jewish magicians, such as Anthony Goldstein. I also read that Harry was baptized, so his parents must have been religious to some extent.
However, not once has Sirius guided Harry through his faith. Maybe Azkaban and Sirius having to hide and even losing his life contributed. We also don’t hear a lot about Harry’s relation to Teddy Lupin and so forth.
Lily and James did designate Sirius as Harry’s guardian, which could be why he was able to sign Harry’s Hogsmeade permission slip in the third installment. But Teddy’s grandparents were the designated guardians for him.
Someone on Quora asked why religion doesn’t receive much attention in Harry Potter, and somebody from the UK answered by stating that people there don’t usually discuss religion. Many places actually forbid talking about religion here in the US.
But my guess is that J.K. Rowling may have changed the godparent roles for wizards and made them more of other reliable adult figures for children instead of religious sponsors. Either for plot convenience or to avoid sounding too insensitive.
Regardless of what godparents actually are, they can still do more with them besides anything religious. For instance, I once had a friend whose godmother use to babysit for him.
They might mentor their godchildren and even protect them, similar to the way the kids’ parents do.
So, I supposed the roles of godparents for wizards and muggles can share similarities here and there.