Dain

Dain is a name used as both a given name and a surname in various cultures. In Nordic and Baltic contexts the form Dáin or Dain appears as a masculine given name; in some cases it is used as a surname. The precise origin of the name varies by language and region, and etymological explanations are not uniform, with possibilities ranging from ancient Germanic roots to standalone usage.

In fiction, Dáin Ironfoot, commonly referred to as Dáin II Ironfoot, is a prominent dwarven king in J. R. R. Tolkien's legendarium. He rules the Iron Hills during the events surrounding The Hobbit and the War of the Ring, and is portrayed as a steadfast ally of Thorin Oakenshield and the other dwarves.

Outside of Tolkien, Dain appears occasionally as a personal name and, less commonly, as a surname in different countries. Today its usage is relatively limited and pronunciation varies with language. The name can be encountered across Europe and in diaspora communities, reflecting broader patterns of cultural exchange and naming practices.