Jan Heemskerk Abrahamszoon (30 July, 1818 - 9 October, 1897) was a Dutch politician, who became the prime minister of the Netherlands in 1874 until 1877, and again in 1883, until 1888. His son, Theo Heemskerk was also prime minister, in the period 1908-1913. Wikipedia
The definitive Wikipedia entry for Jan Heemskerk. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Jan_Heemskerk