↑ Duhoux 2007, pp. 220–222. ↑ Renfrew 1998, pp. 244–245 (see Tables 1 and 2 for all loanwords except personal names, toponyms and theonyms). ↑ If the substratum is actually Indo-European, pyrgos as well as Pergamos might be connected to Proto-Indo-European *bhergh-. ↑ Beekes 2009, p. 1048.