Background
Reventlow was the third son of Christian Ditlev Reventlow and his wife Benedicte Margrethe von Brockdorff. As such, he was born into a family of significant influence and wealth. His father, an officer and diplomat, had close familial ties to the Danish royal family and had been betrothed to Anna Christiane Gyldenløve, illegitimate daughter of King Christian V of Denmark, who died young.