Sackville-Baggins

Sackville-Baggins family
The Sackville-Baggins family was founded by the marriage of Longo Baggins to Camellia Sackville, heiress of the Sackville family headship. Their son, Otho Sackville-Baggins, adopted a double name, kept by his wife Lobelia (née Bracegirdle). They had a son Lotho, who was murdered. At Lobelia's death the brief-lived family disappeared.

The name Sackville was a familiar "aristocratic" name in Tolkien's day, especially in double-barrelled names such as Sackville-West, and he presumably used it (and the contrast with the more mundane Baggins) to imply the somewhat snobbish nature of the Sackville-Bagginses. Notes in the guide for translators of the LotR show Tolkien also had the "sack"/"bag" connection in mind, which is kept in most translations, e.g. in Dutch the name becomes Buul-Balings, "buul" and "baal" both being words for sack or bag.