Kim Dong-hyun (Korean: ???, ???; born September 9, 1988), anglicized as Dong Hyun Kim, also known as "The Maestro", is a South Korean mixed martial artist currently fighting in the UFC's lightweight division.
At the turn of 2019, he began to use the ring name Dong Hyun Ma (???; Ma Dong-hyun; "Ma" as in "Maestro") to better distinguish himself from fellow South Korean mixed martial artist Dong Hyun "Stun Gun" Kim.