Simone's been used consistently over the years.
Simonette was
Anne Boleyn's governess in
Jean Plaidy's
Murder Most Royal, a historically accurate novel about Boleyn, but I'm not sure if
Simonette actually existed (although admittedly I haven't searched for her online yet).
There's also
Simona and
Simonetta.
Don't know if those are the kinds of names you're looking for or not, but I'd thought I'd offer them anyway.
Miranda