Just surfing idly and searched my surname thereby to your site. Also the mindspring site which mentions Susannah Haythornthwaite and her sons.
I haven't checked with my father, who has always claimed not to know of his geneology.
He is George Lightbown, born 1911 in Lower Darwen, Blackburn, Lancashire.His father was William and he had at least three unmarried uncles, including an Arthur and a John.I will ask him if his grandmother was Susannah Haythornthwaite though he may say that he doesn't know her as anything but Granny.
I was born in 1947 and my sister in 1953.
My father had a younger brother, Tom - though I think his real name was Timothy.They had a younger sister, Mary.
I'll get back to you when I've spoken with my father.
Dr Ray Lightbown