I did not realise this until today, but I share my birthday with John Wallis (23 November 1616 – 28 October 1703). Wallis made contributions to infinitesimal calculus, analytic geometry, algebra and the theory of colliding bodies. He is best known for the infinity symbol \(\infty\).

Wallis was also a code breaker and used his mathematical skills during the Civil war to decode Royalist messages for the Parliamentarians.

I dont think I share my birthday (26th October) with anyone.

You share a birthday with Frobenius

http://en.wikipedia.org/wiki/Ferdinand_Georg_Frobenius

Happy Birthday

Just as a remark, I also share a birthday with van der Waals and Moseley.