I'm not sure about the -leigh ending. It feels like an affected way to spell -ley like Hayley vs. Hayleigh. The first time I ran into the name Whitley was on the 80s spinoff of the "Cosby Show", "A Different World". It's a less popular variation of Whitney. I wonder why your husband likes it so much.
I kinda like it! I think many people, especially older ones would always hear Whitney first,and that might become tiresome. Like the others, I prefer the whitley spelling.
I, too, recall the Whitley character from 'A Different World'. It's a little princess-y, especially w/the -leigh spelling. That might be the appeal for your husband. I don't hate it...it just frightens me a little.
What do I think of Whitleigh?
Not too much. No, not much at all.
I don't care for Whitleigh, the name or the spelling. I think it's a name you'll get mixed reviews on in real life. For me, it's almost hard to say. Like it doesn't roll off the tongue very easily.