You were raised on Mindoir on the fringes of the Attican Traverse. When you were sixteen, the colony was raided by slavers. The entire settlement was razed and your friends and family were slaughtered. A passing Alliance patrol rescued you, but all you loved was destroyed.
One thing that’s excellent about the dwarves is how they’re all family. Bofur and Bombur probably got visits from their cousin Bifur sometimes, in his pre-axe-to-the-head days, when Bombur was slightly less fat.