Arcandam was a celebrated astrological pseudonym

Pseudonym

A pseudonym is a name that a person assumes for a particular purpose and that differs from his or her original orthonym...

 of the sixteenth century, under which books of predictions were published in Latin and French from about 1540. The name was still in use in the 1630s. It is assumed that Richard Roussat, a canon and physician of Lyon

Lyon

Lyon , is a city in east-central France in the Rhône-Alpes region, situated between Paris and Marseille. Lyon is located at from Paris, from Marseille, from Geneva, from Turin, and from Barcelona. The residents of the city are called Lyonnais....

 whose name appears on the early works as editor, was the author of the early works.

The best known of the Arcandam books is the Livre de l'estat et mutation des temps of 1550. This formed one of the sources for the prophecies of Nostradamus

Nostradamus

Michel de Nostredame , usually Latinised to Nostradamus, was a French apothecary and reputed seer who published collections of prophecies that have since become famous worldwide. He is best known for his book Les Propheties , the first edition of which appeared in 1555...

.

There are some secondary pseudonyms/attributions appearing alongside Arcandam:

• Aleandrin,
• Aleandrinus,
• Aleandram,
• Alcandrin,
• Alcandrinus (perhaps suggesting Alkindus),
• Al-Kindi
  Al-Kindi
  ' , known as "the Philosopher of the Arabs", was a Muslim Arab philosopher, mathematician, physician, and musician. Al-Kindi was the first of the Muslim peripatetic philosophers, and is unanimously hailed as the "father of Islamic or Arabic philosophy" for his synthesis, adaptation and promotion...
  
  .