[Opinions] we're going to pretend here ...
That I don't have a SIL named Whitney.
I'd choose Whitney, because I like it ad I really don't like Sydney. Sydney just sounds sneaky and shady like a mobbed-up Hollywood producer back in the forties who wouldn't be above taking advantage of his leading ladies, or having a troublesome rival fall victim to a mysterious "accident.:
Whitney Alexis
Whitney Dawn
Whitney Grace
Whitney Suzanne
Whitney Opal
Whitney Faye
Before you criticize a man, walk a mile in his shoes. That way, when you criticize him, you're a mile away and you have his shoes!
Steve Martin