Dengiz Beg Rumlu[a] (died 1613) was an Iranian courtier, who served as merchant-envoy to Habsburg Spain during the reign of Safavid king (shah) Abbas I (r. 1588–1629).
[1][2] At the Spanish court of Philip III (r. 1598–1621), where they arrived in 1611, a major misunderstanding arose; Dengiz Beg had sold more than half of the total bales of silk for his own profit.
[5] Conform Abbas I's desire, at the Spanish court, Dengiz Beg Rumlu supported the elevation of de Gouvea to the rank of bishop of Cyrene and Apostolic vicar of the Armenians of the royal capital of Isfahan.
[1][5] Dengiz Beg and de Gouvea set sail for Safavid Iran from Lisbon in March 1612 with gifts and presents from the Habsburg crown.
[4] Abbas' anger with Dengiz Beg was most likely increased by Philip III's meager responses and actions and for "reawakening" his dissatisfaction with the Portuguese occupation of Hormuz.