Girayr, or Zhirair, born Harutiun-Mardiros Boyadjian (1856 - 24 March 1894) was an Armenian fedayee leader, the senior brother of Medzn Mourad.

He studied at Vartanian school in Hajin and then, from 1872 to 1874, in Constantinople. Then he returned to Western Armenia and worked as a teacher. In the 1880s he lived in Russia. Then he was the director of Hajin central college of St Toros church, but after the Turkish authorities decided to arrest him in 1889, Zhirair fled and moved to Constantinople, where he joined Social Democrat Hunchakian Party. He expressed the solidarity of the oppressed people of the Ottoman Empire, contacted with the Kurdish and Turkish revolutionary activists. Jirair founded a fedayee group for the revolutionary activities, in 1892 edited and distributed papers against the Abdul Hamid II's sultanism. He worked in the Caucasus (Russian Empire), then Adana, Hajin. Known with the Zhirair the Great (Medzn Zhirair) nickname, he mainly acted in the regions of Cilicia and Sebastia. After Ottoman authorities arrested 850 innocent Armenians, Jirair agreed to capitulate and was hung.

Vahram Papazian acted as Jirair in a play by Hemayag Aramiants.