Complex sentence: Sir Isaac Lowthian Bell (1816--1904) was like Abraham Darby the forceful patriarch of an ironmaking dynasty; both his son Sir Hugh Bell and his grandson Maurice Bell were directors of the Bell iron and steel company.
Split into simpler sentences: Sir Isaac Lowthian Bell (1816--1904) was, like Abraham Darby, the forceful patriarch of an ironmaking dynasty. Both his son Sir Hugh Bell and his grandson Maurice Bell were directors of the Bell iron and steel company.