A straightforward and popular way to find out who died on one's birthday is to use "The Death Report" hosted by oneplusyou.com. In addition to detailing exactly how many people died on a specified date, it lists the deaths of a number of notable figures.
Taking November 3 as an example, "The Death Report" lists the deaths of the creator of Batman, Bob Kane, in 1998 and French artist Henri Matisse in 1954.
Another method of finding out who died on one's birthday is to use an online tool such as Ancestry.com, which searches national archives for death dates. This website charges a fee but does offer a free trial.