Vistulan

…of the Wiślanie tribe (Vistulans), who occupied Małopolska (Little Poland) until the 10th century. From 988 to 990 Mieszko I, prince of Poland, united the southern and northern territories to form a powerful kingdom, and his son, Bolesław I (the Brave), later made Kraków the seat of a Polish…

…settlement (castrum) of Gniezno—and the Wiślanie—who lived near Kraków—expanded to bring other tribes under their control.