thumb|[[Planisphere made by Rumold Mercator, 1587]]
Rumold Mercator (1541 in Leuven – 31 December 1599 in Duisburg) was a cartographer, son of Gerardus Mercator and brother of Arnold Mercator, both also cartographers.
He completed some at the time unfinished projects left after his father's death and added new materials of his own research.
Biography
Rumold Mercator was the youngest son of cartographer Gerardus Mercator and his first wife Barbara Schellekens. He rose to fame in his father's wake when, in 1587, he published a copy of his father's Ptolemaic map of the world from 1569, revised in its overall graphic design.
In 1595, a year after his father's death, Rumold Mercator published a supplement of 34 maps to his father's Tabulae Geographicae map book.