This website was established to research the Seery, Seary, Searer and Sierer Surnames. There appear to be several Seery lines which are not related. The Seery (O'Seery) name is most often considered to be of Irish origin. There is a possibility that the name is also a variation of the Sierer surname with the final "r" being silent and the name being pronounced Siere or Sieri. The Sierer surname is of German / French origin.