After the war, he and Pippin play an important part in the liberation of the Shire from Sarumon. Merry gains the title of Meriadoc the Magnificant and becomes head of the Brandybucks. He marrys Estella Bolger. Long years later, when he is much older, he recieves an invitation to return to Rohan to visit the old and dying King Eomer. He and Pippin leave the Shire and are never seen there again. They visit Eomer and are with him when he dies, then they go to Minas Tirith and lived there for the little time left they had to live. Merry's body is brought back to Rohan, of which he was made a soldier, and is kept there until King Elessar (Aragorn) dies. Then he and Pippin are laid on either side of the King.
2) To be very happy.
2) Claire was a merry person.
Hit the peak of popularity In the 50's.
Apparently an assimilated form of Mercy.
Merry is occasionally a short form of Meredith.
Nowadays the name is usually bestowed because of its association with the adjective denoting a cheerful and jolly temperament.
In the accent of Canada and the central and northern US there is no difference in pronunciation between Merry and Mary.