The Adventures of Tom Bombadil actual translation from the "Red Book of Westmarch", and contains some background information on the world of Middle-earth that is not found elsewhere: e.g. the name of the tower at Dol Amroth and the names of the Seven Rivers of Gondor. There is also some fictional background information of those poems, linking them to Hobbit folklore and literature and to their actual writers (some of them are ascribed to Samwise Gamgee). The book uses the letter "K" instead of "C" for the /k/ sound in Sindarin (one of the languages invented by Tolkien), a spelling variant Tolkien used many times
Meriadoc Brandybuck was Drogo Took. He was later renamed Vigo, and the name Drogo reassigned to Frodo's father. After that, he was renamed Marmaduke, and finally Meriadoc Brandybuck. Frodo and Merry are first cousins once removed. Their common ancestors are Gorbadoc Brandybuck and Mirabella Took Brandybuck. Merry was born T.A. 2982 (or, in the Shire-reckoning, in 1382), in Buckland. He is the only child of Saradoc Brandybuck (T.A. 2940-F.A. 11), who was a Master of Buckland, and Esmeralda Brandybuck (née Took) (T.A. 2936- ?), the younger sister of Paladin Took II (T.A. 2933–3034), making him first cousin to Paladin's son Peregrin Took.