1) Abel 2) Algebraist 3) Alhazen 4) Archimedes 5) Arithmetician 6) Bayes 7) Bessel 8) Boole 9) Boolean 10) Bowditch 11) Cartesian 12) Descartes 13) Diophantus 14) Eratosthenes 15) Euler 16) Fermat 17) Fourier 18) Galois 19) Gaussian 20) Geometer 21) Geometrician 22) Godel 23) Hamilton 24) Heron 25) Hilbert 1) French word used in English 2) Man of science 3) Scientist 
A mathematician is a person with an extensive knowledge of mathematics who uses this knowledge in their work, typically to solve mathematical problems. Mathematics is concerned with numbers, data, collection, quantity, structure, space, models and change. Mathematicians involved with solving problems outside of pure mathematics are called applied ...
• (n.) One versed in mathematics.
Math`e·ma·ti'cian noun [ Confer French mathématicien .] One versed in mathematics. 
[n] - a person skilled in mathematics
mathematician An expert or specialist in mathematics.
noun a person skilled in mathematics