Rumold Mercator was a cartographer and the son of cartographer Gerardus Mercator.
He completed some at the time unfinished projects left after his father's death and added new materials of his own research. Wikipedia
Born: 1545, Leuven, Belgium
Died: 1599 (age 54 years), Duisburg, Germany
Nephew: Gerhard Mercator
Siblings: Arnold Mercator
Parents: Gerardus Mercator