I am also looking for a Simonetti/Simonite from Yorkshire.
Martha Jessina Simonetti/Simonite was born in Yorkshire abt 1825. She married John Yellop Rudd in 1840 in London. They emigrated to Australia in 1855. I have her Australian Death certificate, but unfortunately does not give her parents' names, only that her father was a "chronometer maker". My grandmother believes that Martha was of Italian descent. As this is probably an unusual name in Yorkshire, I thought there may be a connection with what you are researching. Unfortunately, until I can obtain a birth or marriage certificate from England for MarthaI am at a dead end.