This is my opinion on these names. You can disagree.
Colin (or Collin) (A more female way is Collyn)
Alex, Brandi or Brandy, Carl, Andy, Tomison, Wren, Kalani, Shay, Ashton, Aston, Blair, Blake, Brook (Though i prefer Brooke, thats more female) Camryn, Chandler, Coby, Dallas, Darian, Derby, Devin, Dylan, Davis, Haven, Jaden, Jamie, Joss, Kennedy, Kirby, Kevin, Lake, Leigh, Logan, Mickey, Morgan, Murphy, Page, Parker, Paris, Reign, Ricky, Riley, River, Robin, Sebby, Sinclair, Skyler, Teddie, Toby, Tristen, Windsor.