slavic name "Tosca"

[Michael Anderau]

Dear SSEELANGers

does anyone know whether there is a slavic origin of the name "Tosca"
(beside of the italian origine of the name "Tosca", which means "Woman from
the Toscana").

I stepped across it not long ago and was reassured that it couldn´t be
italian in that case (and not at all from Rossini opera), and that it
probably has slavic roots.

Thanks for your help

Michael