The White Tree:

Created by Yavanna for the Elves, a seedling of the White Tree, called Nimloth, was given to the Númenoreans, where it grew in the Kings Court at Romenna. Just before the downfall of Númenor, a seedling was stolen by Isildur. It was safe on one of the of the ships that escaped the downfall, and was first planted in Minas Ithil. After the War of the Last Alliance, one of the seedlings was planted in Minas Anor, later Minas Tirith. This tree died in 1636 in the Great Plague. Another seedling was planted after by king Tarondor. This tree died in 2852 and no sapling or seed could be found to replace it so it was left standing. Aragorn found a sapling on the slopes of Mindoluin and replaced the dead Tree, which was laid to rest in the same manner that one of the Kings of Gondor would have been.

Wolf:

The third of Farmer Maggot's dogs.

Wise-nose:

One of the ponies belonging to Merry. Wise-nose was named such during the hobbits stay with Tom Bombadil. When the Prancing Pony Inn was raided, the ponies fled to Bombadil, who later sent them to Butterbur.

White-Socks:

One of the ponies belonging to Merry. White-socks was named such during the hobbits stay with Tom Bombadil. When the Prancing Pony Inn was raided, the ponies fled to Bombadil, who later sent them to Butterbur. White-socks seems to have been the smallest of the ponies.

The Lord of the Rings
The Silmarillion
The Unfinished Tales
The Hobbit
The Complete Guide to Middle Earth by Robert Foster