Complex sentence: Jonathan Bunce Anwyl of Llugwy (1789-1852) who from 1831 would have been the "de jure" head of the House of Aberffraw.
Split into simpler sentences: Jonathan Bunce Anwyl of Llugwy (1789-1852). From 1831 he would have been the "de jure" head of the House of Aberffraw.