In Greek mythology, Mariandynus (Μαριανδυνός) was the eponymous hero of the Mariandyni tribe in Northern Anatolia. He was an Aeolian, a son of either Cimmerius, or Phrixus, or Phineus (and in the latter case, brother of Thynus). He had several sons, of whom the eldest may have been Titias.

In Greek mythology, Mariandynus (Μαριανδυνός) was the eponymous hero of the Mariandyni tribe in Northern Anatolia. He was an Aeolian, a son of either Cimmerius, or Phrixus, or Phineus (and in the latter case, brother of Thynus). He had several sons, of whom the eldest may have been Titias.