In the early American versions Maugrim's name was changed to Fenris Ulf. I don't remember why though. His name was changed back in later printings which is why his name is Maugrim in the movies. In the musical, however, he is called Fenris Ulf because of the early versions. Fenris Ulf had some sort of significance to it, but I forget what. I'll probably wake up sometime in the middle of the night and remember.

There were a number of differences between the old American versions (published by Collier/Macmillan) and the British versions; I believe some of these were discussed on the old forum. New US editions have been changed to match the British.

At least 2 of those early changes relate to the inclusion of Norse mythology in American versions of LWW:

Fenris Ulf is likely a reference to Fenrir, a nasty wolf in Norse mythology that was said to ultimately play a significant part in Ragnarok (the Norse end-times battle).

Another was a reference to the World Ash Tree (Yggdrasil) - a crucial part of Norse cosmology (world/universe structure) - in LWW chapter 13, "Deep Magic from the Dawn of Time." The British version has "fire-stones of the Secret Hill" instead.

Paul Ford's Companion to Narnia contains discussion on some of the changes made between the versions.

I remember that the version my fourth-grade teacher read to my class had Fenris Ulf instead of Maugrim in it. She told the class about the name change, and I remember thinking "Fenris Ulf" sounded cooler than "Maugrim."

In the early American versions Maugrim's name was changed to Fenris Ulf. I don't remember why though. His name was changed back in later printings which is why his name is Maugrim in the movies. In the musical, however, he is called Fenris Ulf because of the early versions. Fenris Ulf had some sort of significance to it, but I forget what. I'll probably wake up sometime in the middle of the night and remember.

yeah, I figured Maugrim must have been the original! thanks!

There were a number of differences between the old American versions (published by Collier/Macmillan) and the British versions; I believe some of these were discussed on the old forum. New US editions have been changed to match the British.

At least 2 of those early changes relate to the inclusion of Norse mythology in American versions of LWW:

Fenris Ulf is likely a reference to Fenrir, a nasty wolf in Norse mythology that was said to ultimately play a significant part in Ragnarok (the Norse end-times battle).

Another was a reference to the World Ash Tree (Yggdrasil) - a crucial part of Norse cosmology (world/universe structure) - in LWW chapter 13, "Deep Magic from the Dawn of Time." The British version has "fire-stones of the Secret Hill" instead.

Paul Ford's Companion to Narnia contains discussion on some of the changes made between the versions.

that makes sense! thanks! well, I like the name Maugrim better!

In America Maugrim's name was changed to Fenris Ulf. In 1998 I played Lucy on stage and his name was Fenris Ulf but in an old copy that I got from my uncle who lived in England of LWW his name is Maugrim. It has to do with a meaning and Lewis probably thought American's wont get it.

IDK I just like the name Maugrim better than Fenris Ulf.