Last name Oignon (Ui 
, Agnon 
, Oignon 
) , globally, is quite a common family name. The surname Oignon is characteristic of Macao, where it is quite a rare surname, Malaysia, and Oman, where it is a rare surname. In absolute terms, the name is most common in Indonesia, Malaysia, and China. Also, Oignon is the forename as well as the last name.