Master Engineer Giellun tr'Keirianh was a Romulan, the chief engineer of the ChR Bloodwing. Tr'Keirianh was serving under Ael t'Rllaillieu in the 2270s when that ship went rogue. (TOS - Rihannsu novels: My Enemy, My Ally, The Romulan Way)

ChR Bloodwing personnel
Nniol t'AAnikh • Dhiemn • Dhisuia • Dhiov • Ejiul • Eriufv • Gehen • Gioufv • Haehwe • Helev • T'Hrienteh • Ireqh • Giellun tr'Keirianh • K'haeth • Kiel • Hvaid t'Khaethaetreh • Khiy • Aidoann t'Khnialmnae • Khoal • Hilae • Himif • Lahae • Lhian • Lyie • N'alae • Raha • Rai • Rhioa • Ael t'Rllaillieu • Tafv tr'Rllaillieu • T'maekh • Triy • t'Viaen