Ohh, yes. Tiane, Tianne,
Tiana,
Tianna, Tiahn, Teahn, Teeahn... I've seen loads of spellings of that one.
I didn't include it because it's just something that happens to be popular there, rather that something that originated there. Another one like that would be
Bronte - oddly popular in Australia but not of Australian origin.
Seaforth and Dimity, I suppose shouldn't count either for that reason but I never claimed to be consistent ;)
https://nanowrimo.org/participants/christine-seaforth-finch
http://christineseaforthfinch.blogspot.com/