For example Danielle / Daniel or Michelle / Michael.
I have the feminine form of name that has been used a lot in my family (historically), and for my first born son I would love to use it and I also really love the boy form of the name.
My DH loves the name, as do my parents but will everyone else just be eyes to the sky thinking I am naming him after myself not knowing the family link? (Don't know why I care what they'd think but can't help it!)