Proper noun
One of the départements in Hauts-de-France, France. Capital: Laon (INSEE code 02)
A river in northern France, which flows into the Mayenne River
Source: en.wiktionary.orgCharles Martel died on October 22, 741, at Quierzy-sur-Oise in what is today the Aisne département in the Picardy region of France. Source: Internet
Due east, the hills of Arnay are crowned with five large and important works which cover the approaches from the upper Aisne. Source: Internet