Family name origins & meanings
- French : derogatory nickname from chiasse ‘excrement’.
- There was a Chiasson or Giasson from La Rochelle, France, documented in Quebec city in 1683; other sources claim a Guyon Chiasson, also known as LaValée, from La Rochelle, who settled in Acadia around 1650 and is the progenitor of the LA families.