Somehow the Welsh branch is being ignored. There is a Mansell (exact spelling) castle in ruins from the 12th century in Abergavenney, Wales with a small museum. There is also a Mansell street in London, United Kingdom, off the Tower of London. Some years ago there was a BBC mini-series about Charles I and the Welsh Mansells were "Royalists" and played a part in putting Charles II on the throne after his father was beheaded, the only English king ever beheaded. There are Mansells in Wales who believe they are descended from a "de Mauncil" knight from Normandy (Normans). Been there, done that.