We already have a William but have always liked Kate (would be Katherine). Given possible strong royal connections is this a bad idea?
Our surname sounds a bit like Duncan. Do you think that it's a problem that the t of Kate would blend into the surname? Kate Duncan
Other options could be:
Helena Duncan
Connie Duncan
Julia Duncan
Nell Duncan
Nancy Duncan
Corinna Duncan
Eliza Duncan
Rosie Duncan (Rosalind)
Any other suggestions welcome!