Which Tolkien character is the father of the dragon Smaug?

J.R.R. Tolkien named no father for the dragon Smaug.

Smaug is presented in The Hobbit as a powerful, solitary dragon who seized the Dwarves’ treasure beneath the Lonely Mountain. Tolkien gives Smaug a clear role, personality, and history as the destroyer of Dale and Erebor, but he does not identify a parent or provide a family lineage for him.

This makes “no named father” the precise answer rather than the name of another dragon. Glaurung and Ancalagon are separate dragons from Tolkien’s earlier mythology, not Smaug’s established parents. Their appearances in related discussions can create a misleading impression of a documented dragon family tree.

Smaug’s name is connected with the Germanic word “smaug,” from a verb meaning to creep or squeeze through a hole. Tolkien’s dragon is also notable for his speech, intelligence, and love of riddles and treasure, rather than for any stated ancestry.