Michael Jordan

Basketball player Michael Jordan started out as a math major but switched majors his Jr. Year.

Lewis Carroll

Lewis Carroll, author of Alice in Wonderland, majored in mathematics.

Jiffy

A ‘jiffy’ is an actual unit of time for 1/100th of a second.

J. P. Morgan

J. P. Morgan, banking, steel, and railroad tycoon, majored in mathematics.

Incas

The Incas and certain other pre Columbian tribes in Peru developed the Decimal System hundreds of years before it was used in Europe.
http://www.skygaze.com/content/facts/math.shtml

In 594 AD decimal notation is used for numbers in India. This is the system on which our current notation is based.