Very happy to have found this thread. I am from Barrow in Furness in Cumbria (now living in Norway) and started my family tree search a good decade ago. Charles Stewart married Sarah Young or Lowther (I believe Lowther was her mothers name and Young was her fathers : Isaac Young was the name I had found but I could be wrong there.).
My own connection is that my grandmother was Mary Stewart (born in Ulverston) and Charles was her grandfather. I've seen the family tree up to Charles and beyond since the 1970s so I know it to be accurate as I guess it was put together via my ancestors. I recall mention of the gypsy heritage... but I was only just reminded upon reading this thread.
I attach an actual chart that is based on or actually was on my grandmother's wall well into the 1980s (I seem to recall it even in 70s but looks like it was printed out on some inkjet printer)
Unfortunately it seems Charles was not such a nice guy... I'll save the details here but I've managed to find all manner of accounts and newspaper articles... now saying that there seems to be a lot of Charles Stewarts around... so who knows for sure which Charles is which..
One other thing... my grandmother died of Huntingtons disease and I am wondering if that is a Stewart trait or not. Anyway, very open to make connections on this.