I use my married name on FB and have the highest security settings. I don't use FB often - maybe once a month if that - its mainly to keep in touch with friends.
I use my maiden name for everything work related. None of my client's know my married name so, even though my security settings are so high and you cannot search my via google, if they tried or FB changed the settings my maiden name does not come up with anything.
It works well for me.