According to some sources, Saint Methodius has been entombed in the church in the town called Kana-/Kata-/Ka-onna, situated on the river of the same name. The reconstruction of this hypothetical fact is based on the old texts and historical and onomastic assumptions. If one accepts the fact, then, there has been only one river of this name in the former Moravia region. Its present Slavic name is Kadan, possibly derived from Non-Slavic, Celtic Kadona (Kadonna) 'Holy River' (in the same way as Slavic katan comes from Hungarian katona). This river is located near Nitra, the assumed seat of king Svatopluk I., and it flows through the following towns: Stitare, Pohranice, Lapas, Golianovo, one of which should have been the town of Kadan. The name Pohranice must be derived form the ethnonym Pograni 'the Pograns', i.e. the inhabitants of the basin of Gran (Hron). It has been these Pograns who could have changed the name of the town and the name of the river, which was called Kadan as well as Pogran River. Consequently, Saint Methodius could have been entombed in the church in Pohranice, which is one of the oldest in the former Moravia region, being mentioned in 1075.