The Újlaki family, in old sources de Illoch, de Wylak, de Voilack etc., Hungarian: Újlaki) was a Croatian–Hungarian noble family, descended in the male line from Gug, a member of the lower nobility in the region of Lower Slavonia during the 13th century.

Ilok is the easternmost town in Croatia forming a geographic salient surrounded by Vojvodina. Located in the Syrmia region, it lies on the Fruška Gora hill overlooking the Danube river, which forms the border with the Bačka region of Serbia. The town is home to a Franciscan monastery and Ilok Castle, which is a popular day trip for domestic and cross-border tourists.