The surname Paccagna is of nickname origin and derives from bynames formed from the dialect term paccagna. In this sense, E. Rossoni notes that this word may mean both "blow" and "medlar", which suggests different possible semantic motivations in the formation of the nickname.

In this way, the surname could have originated as a descriptive designation, whether linked to personal characteristics, behaviours or references to the natural environment. According to E. Rossoni, these forms, together with their variants, are documented in areas of northern Italy, which reinforces their development in local dialect contexts.