Ladislaus IV of Hungary
Ugrin (III) from the kindred Csák (, , ; died in 1311) was a prominent Hungarian baron and oligarch in the early 14th century. He was born into an ancient Hungarian clan. He actively participated in the various internal conflicts during the era of feudal anarchy since the reign of Ladislaus IV of Hungary. He held various dignities in the royal court in the 1270s. Simultaneously, he established a province surrounding his centre Syrmia in the southern parts of the kingdom.