The Order of the Trillium is similar to the Order of the Rose.

Any person who served as a Princess or Prince consort in the Principality of Ealdormere was automatically inducted into the order when she or he stepped down from the throne.

When Ealdormere became a Kingdom, the Order of the Trillium was closed. Viscount Menken is the only male member of the Order of the Trillium.