When working in Brazil, I met twins called Jefferson and Jackson - actually really like them.
One of my friends had a 'rule' when he and his partner were expecting that the name must not be a surname. It was really annoying my other friend (the partner) because almost every name she came up with (esp for boys) he could show had been a surname to someone somewhere.
But commonly thought of surnames that I like as names are:
Girls:
Addison, Bailey, Colby, Madison, Mackenzie, Mackenna, Taylor, Sutton, Quinn, Kendall, London, May, Kennedy, Morgan
Boys:
Austin, Ashton, Bailey, Brogan, Blair, Blake, Carter, Christian, Cole, Ellis, Fitch, Flynn, Gray, Harris, Harrison, Hunter, Logan, Lennox, Mason, Morgan, Owen, Parker, Spencer