Ibun

When Mîm and his sons Ibun and Khîm were set upon by Túrin's outlaw band, the two brothers fled into the mist. As they ran, Khîm was shot by a wild arrow from the outlaws, but Ibun survived, and shared his father's House of Ransom with Túrin and the outlaws. One winter, the two Petty-dwarves went out in search of roots, and were captured by a band of Orcs.

We know that Mîm survived his capture by betraying Túrin to the Orcs, but Ibun's fate is unclear. Much later, in Nargothrond, Mîm told Húrin, 'I am the last of my people', so Ibun cannot have survived to that time. Whether he lost his life at the hands of the Orcs, or in some later unrecorded mishap, is not known.