Ariawan Arjuna Alvarez, D.O. -- nicknamed Iwan -- was a Federation Starfleet medical officer, of Indonesian and Filipino descent, on active duty in the 24th century. (Star Trek: Avenger: "Nearly a Valediction") He was born to Dr. Javier Alvarez, a psychiatrist, and Dr. Lisa (née Sutomo) Alvarez, a neurosurgeon, in Ghazzat Hashim, one of the earliest settlements on Mars. His family moved back to Earth when Iwan was five years old, in 2285. On conclusion of his residency in 2309, Alvarez became a lieutenant aboard USS Avenger, commanded by Judith Waidlich.