Hamish Hubert en Harris.
"Merida’s younger triplet brothers are named Hamish, Hubert, and Harris. (Clearly Fergus and Elinor are big fans of alliteration.) “You can’t tell them apart, and they steal the show,” says Andrews. “They love sweets and are always getting into mischief. And they can do no wrong as far as Fergus and Elinor are concerned.” Andrews also revealed that the triplets won’t have any spoken lines in the film: “They giggle and laugh — that’s it.”