When I was younger I heard (or read - can't remember!) the name
Jasper somewhere and instantly thought of it as a female name (like most, if not all, gemstones) and when I came to this site a year ago and found out it was masculine it surprised me. So then I slowly started liking it for a boy and came up with the combos
Jasper William and
Jasper Henry. But now I think I'm going back to my original preference for it as a girls name.
Out of your combos I like
Jasper Lachlan and
Jasper Owen.