köken: Etymology tree Ancient Greek βῠ́βλος (bŭ́blos) Proto-Indo-European *-yósder. Ancient Greek -ῐος (-ĭos)? Ancient Greek -ιον (-ion) Ancient Greek βυβλίον (bublíon) Ancient Greek βιβλίον (biblíon)der. Polish biblio- Proto-Indo-European *bʰil-o-s Ancient Greek φίλος (phílos)der. Polish -fil Polish bibliofil From biblio- + -fil. First attested in 1782.