Baudhayana

(apprx 800 B.C.) Ancient mathematician who laid down rules of measurement in his masterpiece Sulva Sutra, which also deals with irrational numbers

Medhatithi

(6th century A.D.) Indian mathematician who introduced the concept of Logarithmics (powers of 10) and was able to calculate very large numbers precisely

Kamat's Potpourri Who's Who, What's What