I helped poularize the Danish idea of prosthaphaeretic multiplication, useful in astronomical observatories to compute trigonometric tables.
Not a mathematician, I was a Scottish laird, the Baron of Murchiston, and managed large estates.
In one of my books, I argued that the Roman pope was an anti-Christ.
My special system of rods or "bones" enable one to multiply multidigit numbers easily.
I am the father of logarithms, a technique that uses properties of exponents to simplify the multiplication and division of either large or small numbers, where the base of my system was essentially 1/e.
John Napier (1550-1617)