Baba Budan, 17th century Sufi reputed to have introduced coffee to India
See Budan's theorem for a description of the historical background of these methods.
Baba Budan was a 17th-century Sufi, revered by both Muslims and Hindus, whose shrine is at Baba Budangiri, Karnataka, India.
Budan's work on approximation was studied by Horner in preparing his celebrated article in the Philosophical Transactions of the Royal Society of London in 1819 that gave rise to the term Horner's method; Horner comments there and elsewhere on Budan's results, at first being sceptical of the value of Budan's work, but later warming to it.