Konstantin Kastrioti (died 1390)

This article is about the Albanian ruler. For other uses, see Constantine Kastrioti.
Genealogy of the Kastrioti family, Du Cange (1680), Historia Byzantina duplici commentario

Kostandin Kastrioti Mazreku (died ca. 1390) was an Albanian regional ruler in parts of the wider Mat and Dibër areas. He is the first Kastrioti to be known by his full name and the progenitor of all members of the family. His son was Pal Kastrioti (also attested with other names), grandfather of the Albanian national hero, Skanderbeg.