I attended a wedding once, I worked with the groom and had only met the bride briefly, but I had only heard her referred to as
Tess by her partner. At the alter, the vicar revealed her name was
Esther Rachel. Apparently there were two
Esther's in her class and five
Rachel's, so to distinguish herself she chose
Tess rather than Ess or
Essie.
Tess could also work for:
Theodosia?
TessaTesniContessa
TeresaTeresinhaThessaly