Complex sentence: On his father's side Lindsay descends from the Scottish clan Lindsay presided over by his uncle, Robert Lindsay, 29th Earl of Crawford, and on his mother's side from the Capel Cure family and the Vorontsov's, former Chancellors of Imperial Russia.
Split into simpler sentences: On his father's side Lindsay descends from the Scottish clan Lindsay presided over by his uncle, Robert Lindsay, 29th Earl of Crawford. His mother's side from the Capel Cure family and the Vorontsov's, former Chancellors of Imperial Russia.