He didn't like her first name. 'Vivian - it's neither one thing nor the other. It'll confuse people. They won't know if you're a man or a woman. Will you agree to spelling it Vivien?'.
a female given name, an exclusively feminine spelling variant of vivian
Hyphenation
a fe·male giv·en name, an ex·clu·sive·ly fe·mi·nine spell·ing va·ri·ant of Vi·vi·an