That seems pretty strong, but Wiktionary analyzes these two kinds of -anie as different suffixes https://en.wiktionary.org/wiki/-anie#Polish https://en.wiktion

That seems pretty strong, but Wiktionary analyzes these two kinds of -anie as different suffixes https://en.wiktionary.org/wiki/-anie#Polish https://en.wiktionary.org/wiki/-anie#Polish without stating whether they're etymologically related. It would also be good to know whether both exist in other Slavic languages. https://en.wiktionary.org/wiki/-anin#Polish https://en.wiktionary.org/wiki/-anin#Polish has another example in Serbo-Croatian, which in turn has a different suffix corresponding to Polish -anie: https://en.wiktionary.org/wiki/-anje#Serbo-Croatian https://en.wiktionary.org/wiki/-anje#Serbo-Croatian I don't know any of these languages, so I don't have any intuitions about this.