William Wynn Westcott
William Wynn Westcott (17 December 1848 – 30 July 1925) was a coroner, ceremonial magician, and Freemason born in Leamington, Warwickshire, England. He was a Supreme Magus (chief) of the S.R.I.A and went on to co found the Golden Dawn.
He was a doctor of medicine.
In 1880 he began studying the Kabbalah.
Societas Rosicruciana in Anglia 
The Golden Dawn 
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In 1896, he abandoned public involvement with the Golden Dawn due to pressure regarding his job as a Crown Coroner, with which it was seen as an unseemly association. He continued to head the S.R.I.A. and later was involved with the Golden Dawn breakaway Stella Matutina.
Later years 
He was the author of many books on occult topics.
- The Origin of the Rosicrucians and Freemasons
- The Occult Power of Numbers
- An Introduction to the Study of the Kabalah
- A Lecture To Inquirers Into Theosophy And Practical Occultism
- History of the Rosicrucian Societies in Anglia
As translator 
Books translated into English:
- The Isiac Tablet, about the author section
- Ars Quatuor Coronatorum Vol. 7 1895
- Regardie, page 17
- "SEPHER YETZIRAH OR THE BOOK OF CREATION". 1887. Retrieved Apr/18/13.
- The Isiac Tablet of Cardinal Bembo By William Wynn Westcott
- The Golden Dawn By Israel Regardie