I just can't tolerate this as a girls name. I just can't. It sounds manly, and not just manly, but middle age, greasy tupee wearing manly. HM, makes me wonder if I knew someone named that! hahaha!!
As far as really using it, I thik you would be fine in doing so. Now that
Mariah Carey has named her daughter
Monroe, it's possible that many others will do similarly and it will be a girls name all together after awhile.