Theosophical Society Adyar
The Theosophical Society was founded by Helena Petrovna Blavatsky and others in 1875. The designation 'Adyar' is sometimes added to the name to make it clear that this is the Theosophical Society headquartered there, after the American section and some other lodges separated from it in 1895, under William Quan Judge.
Source: Wikipedia — Theosophical Society Adyar (CC BY-SA 4.0)