Complex sentence: Slavs arrived in the region in the late 5th/early 6th century and indeed the name "Tokaj" is derived from the Slavic word "Stokaj", meaning approximately confluence (i.e. confluence of the rivers Bodrog and Tisza).
Split into simpler sentences: Slavs arrived in the region in the late 5th/early 6th century. One possible origin for the name "Tokaj" is that it is derived from the Slavic word "Stokaj", meaning approximately confluence (i.e. confluence of the rivers Bodrog and Tisza).