The Dadian family was an Ottoman Armenian family that was famous for their industrial activities within the Ottoman Empire. Besides being prominent factory owners (the family had a monopoly on the empire's gunpowder industry for more than a century), members of the family also served as political advisers. Georgian-Mingrelian Princley family of Dadiani that was under the Russian rule known in three forms Dadiani / Dadian / Dadianov are not related to the latter family.