Eld is a Swedish surname derived from Old Norse eldr, modern Swedish eld, meaning "fire." As a topographic or ornamental surname, it likely originated from a habitation near a prominent fire feature, such as a hearth or a forge, or from a nickname for someone with a fiery temperament. In Sweden, surnames of this nature gained popularity in the late 19th and early 20th centuries when many families adopted natural elements as hereditary last names. The name is uncommon, with distribution primarily in Sweden and among Swedish diaspora communities, according to Forebears data. There are no widely known notable bearers, and the name has no documented variants in Swedish naming traditions. Rare use as a given name also exists in English-speaking contexts, but that usage stems from a different etymology. As a genuine Swedish surname, Eld remains a concise and evocative name tied to the vital natural force of fire.