Hovhannes Khan Masehian (Armenian: Յովհաննէս Մասեհեան, February 23, 1864 in Tehran - November 19, 1931 in Kharbin) was an Iranian Armenian translator and diplomat, well known as the translator of Shakespeare's and Byron's works into Armenian. Since 1912 he was the Persian Ambassador to Germany. From 1927 to 1929 he was the Persian Ambassador to the Great Britain. He was the first Ambassador of Persia in Japan. Masehian was the editor of the Armenian journal Shavigh Tehran, 1894).