Wolfram Research
Wolfram Science World: Bernoulli, Johann (1667 1748)
This site from ScienceWorld contains a short but factual biography of Johann Bernoulli. Includes a picture, along with quite a few links that contain additional information on related subjects.
Trinity College Dublin
Trinity College: Development of Analysis on the Continent
This page of brief biographies taken from "A Short Account of the History of Mathematics," includes a paragraph on the life and work of Gabriel Cramer of "Cramer's Rule," fame.