These first two posts on Old European hydro-toponymy contain excerpts mainly from Indoeuropeos, iberos, vascos y sus parientes, by Francisco Villar, Universidad de Salmanca (2014), but also from materials of Lenguas, genes y culturas en la Prehistoria de Europa y Asia suroccidental, by Villar et al. Universidad de Salamanca (2007). I can’t recommend both books hardly enough for anyone interested in the history of Pre-Roman peoples in Iberia and Western Europe.
NOTE. Both books also contain detailed information on hydrotoponymy of other regions, like Northern Europe, the Aegean and the Middle East, with some information about Asia, apart … Read the rest “European hydrotoponymy (I): Old European substrate and its relative chronology”