[1] Alternate spellings include Revetlo, Reventlo, Reventlau, Reventlou, Reventlow, Refendtlof and Reffentloff.
The younger branch had acquired by 1673 the Danish Graf and on July 23, 1706, to Vienna the Count of the Holy Roman Empire.
Conrad von Reventlow (1644–1708), Grand Chancellor and Prime Minister of Christian V of Denmark, received the higher feudal rank and was awarded the Liege County of Reventlou - Sandbjerg in Schleswig.
The Reventlow family counts important personalities of the European aristocracy, including the last German empress Auguste Victoria.
The Counts of Reventlow-Criminil with a Danish diploma of 1815 belonged in the male line to the French Marquis Le Merchier de Criminil.
His son Christian Detlev of Reventlow acquired Brahetrolleborg on Funen (1722–1960), Pederstrup on Lolland (1725–1935) and Christianssæde on Laaland (1728–1934).
His son Conrad Detlev Reventlow (1704–1750) married Wilhelmine Auguste, the sister of the Duke Friedrich Karl of Schleswig-Holstein-Sonderburg-Plön in 1731.