Complex sentence: Finian MacDonagh MacCarthaigh, known to the English as Florence MacCarthy, was an Irish chieftain of the late 16th century, the last credible claimant of the MacCarthy Mór title before it was subverted by the English authorities.
Split into simpler sentences: Finian MacDonagh MacCarthaigh, known to the English as Florence MacCarthy, was an Irish chieftain of the late 16th century. He was the last credible claimant of the MacCarthy Mór title before it was subverted by the English authorities.