поганъ (Old East Slavic) comes from Old Church Slavonic поганъ, from Latin pāgānus, from Latin pāgus, from Proto-Italic pāgos, from Proto-Indo-European peh₂ǵos, from Proto-Indo-European peh₂ǵ- — to attach.
поганъ (Old East Slavic): heathen, pagan