Appendix of testis develops from:
Paramesonephric duct gives rise to appendix of testis in males and in females it gives rise to hydatid of morgagni, uterus, cervix and fallopian tubes. Testis is formed from the genital ridge.Ref: Textbook of gynaecology, Dutta, 5th Edition, Page 38.
Mesonephric duct
Mesonephric tubules
Paramesonephric duct
Wollfian duct