Lewenhaupt was born to Count Carl Gustaf Löwenhaupt and Countess Amalia Königsmarck. At the age of 16, he entered Dutch service where he was promoted to the rank of captain in 1709.
Lewenhaupt was born to Count Carl Gustaf Löwenhaupt and Countess Amalia Königsmarck. At the age of 16, he joined Dutch service where he was promoted to the rank of captain in 1709.