Anduin is best known from fantasy usage and likely draws on Welsh-style elements suggesting a river or flowing name.
Anduin owes its existence to one of the most meticulous linguistic imaginations in literary history. R. Tolkien coined the name for the greatest river of Middle-earth — called both the Anduin and the Great River — which flows from the far north through Wilderland, past the Argonath and Gondor, to the sea.
In Tolkien's invented Sindarin language, *and* means long and *duin* means river, making Anduin simply and beautifully 'the Long River.' Tolkien modeled much of his Elvish on Celtic languages, particularly Welsh, so the name carries the soft, vowel-rich musicality of that linguistic tradition. Beyond Tolkien's world-building, Anduin occupies a remarkable cultural position: it is a name born entirely from fiction that has taken on genuine life in the real world.
Parents drawn to Tolkien's mythology have given it to children since at least the 1980s, and it gained a second wave of visibility through the *World of Warcraft* video game franchise, where Anduin Wrynn is a major protagonist — a young king defined by compassion and idealism rather than martial force. This dual literary heritage gives the name unusual depth for something so recently coined. Anduin has a particularly androgynous quality; its liquid sounds and elegant construction have seen it used across gender lines, appealing equally to those who want something ethereal and those who want something epic. As mythological and fantasy names continue to enter mainstream naming culture, Anduin stands as one of the most linguistically coherent and historically grounded of the invented options.