Complex sentence: Of his daughters, Lady Honora O'Brien married Sir Rory Gilla Duff O'Shaughnessy and Margaret O'Brien married Richard Sassanach Burke, 2nd Earl of Clanricarde, but they were divorced after he claimed that she worked witchcraft against him.
Split into simpler sentences: Of his daughters, Lady Honora O'Brien married Sir Rory Gilla Duff O'Shaughnessy. His daughter Margaret O'Brien married Richard Sassanach Burke, 2nd Earl of Clanricarde, but they were divorced after he claimed that she worked witchcraft against him.