[1] He was born at Horsens, the son of farmer Thomas Poulsen Vendelbo (or Windelboe) (died 1693) and wife Anne Nielsdatter (1645–1708).

He then travelled to Russia where he initially worked as a teacher and later became adjutant general at the court of Peter the Great.

His wife bore him a son, Frederik de Løvenørn (6 May 1715 – 15 October 1779) who became a military officer and district governor of Kronborg and Antvorskov.

[3] Carl Ploug (1813–1894) wrote a six-page romantic poem about Løvenørn's early years and first encounter with his wife.

The poem, entitled A Kiss, is included on the anthology Hovedværker i den danske Literatur (Copenhagen: Gyldendal, 1889).