I am also a descendant of George willey and Sarah Webb.
My GGG grandmother was Hannah Willey, daughter of george and sarah. Hannah married William Dunn [Don, Donne] in Drayton Somersetshire, their son Hugh Dunn married Elizabeth Lavis in Drayton Somerset in 1845, Hugh Elizabeth and theeir sons William and James Dunn came to Australia in 1849 on the ship "Hope" as did some other Willeys from Drayton Somerset. I have not worked out the exact relationship betwen the Dunns and the Willeys but I am sure there has to be one.
I would like to know if you have Hannah Wiley on your tree.