Yes, one example is the current Lensgreve Wedell, who was only 6 when he inherited the title.
There are around 10 Lensgrever left in Denmark who follow the old rules. However, a handful of other families also have the primogeniture title of Lensgreve and will continue to have it - because they have long ago been given permission to use the title even though it's not in accordance with the traditional rules. It's rather difficult to explain, so this is just the short answer