Thanks for your message Helen, I have not previously heard the name Parvin, but I have recently made some progress in tracing the Fildes branch of my ancestors and Walter Wright was the key to doing this. So far I have the following.
James Fildes m Annie Elizabeth Parker in 1864 in Manchester Their children were Walter Wright Fildes b 23 Jul 1865 Ancoats Manchester Florance Fildes b 1871 Manchester Elizah Fildes b 1873 Manchester Amy Fildes b 1876 Manchester Evelene Fildes b 1883 Manchester (My grandmother)
Annie Elizabeth Parker was from Sheffield (Yorkshire again)
This family was very hard for me to trace because the parents married 18 years before my grandmother's birth and so they were older than I expected, and their names are listed as Fields in the 1881 census index. Also the male child Elizah (in 1881 census index) probably should be Elijah.
James Fildes parents were probably Elijah Fildes and Mary Ann Adam.
Sorry I couldnt halp with Parvin, but the above may be of use to you.