Girion
From Tolkien Gateway
Girion (d. T.A. 2770) was the last Lord of Dale, killed by the dragon Smaug when Smaug assaulted Dale and the neighboring Dwarf realm of Erebor. One-hundred and seventy years later, Bard, assumed to be Girion's descendant, took revenge on the dragon by slaying him with an arrow.
Girion also had a necklace of emeralds.