From Tolkien Gateway
Belmarie was the name of a country in the poem Errantry by Bilbo Baggins. The name was not actually Elvish but an invention in the Elvish style.
It is unknown if Belmarie referred to an actual region in Middle-earth, or if it was just an invention by the poet.
|Legendary locations in Arda|
|Islands:||Isle of Meneltarma|
|Mountains:||Astulat · Mountains of the Moon · Merlock Mountains|
|Regions:||Aerie · Belmarie · Fantasie · Last Desert · Sindanórie · Thellamie · Tode|
|Other:||Caves of the Forgotten · Gorbelgod|