He was most likely born in Lonely Mountain and went into exile with his clan after the attack by the dragon Smaug. He fathered two sons, Balin and Dwalin, both of which were members of Thorin and Company and involved with the regaining of Lonely Mountain. Fundin was killed beneath the East-gate of Moria in the Battle of Azanulbizar, the final conflict of the War of the Dwarves and Orcs. He was part of the first attack wave that took heavy losses and was forced to retreat to a thicket by lake Mirrormere. He was joined by a number of other Dwarves, including his distant cousin Frerin, but they were ultimately tracked down and slaughtered.
Farin | -------|------- | | | | FUNDIN Gróin | | ---|--- ---|--- | | | | | | | | Balin Dwalin Óin Glóin