There's a male crime writer called Kerry Wilkinson, and I know a male Beverly, but I agree that the general trend is that, once a name starts to be given to girls, it becomes "devalued" as a boy's name and becomes far less common in men. I know that Lesley isn't exactly a fashionable girl's name at the moment, but I think Leslie is even less so for boys. The youngest one I know personally is in his 70s!
The only name I can think of that is truly unisex is Ashley, but I wouldn't be surprised if it became more common for girls over the next couple of decades.