The name Thorin is a boy's name of Norse origin meaning "brave, daring one". Thorin and is often added to user-created lists like Names For Characters (Boys) and discussed in our forums with posts like "What would be the perfect twin?".
From the experts:
From the verb að þora, meaning "to dare." This is a dwarf's name that first appeared in the thirteenth century mythology compilation Prose Edda, which, along with the Poetic Edda, represents nearly all of pagan Scandinavian mythology. Tolkien later used the name for character Thorin II Oakenshield of The Hobbit.