Complex sentence: In 1453-54 title to the manors of Rathmore and Maynooth was disputed between the Butlers of Ormond and the FitzGerald family, with the 5th Earl of Ormond, then Lord Lieutenant, supporting his family's claim.
Split into simpler sentences: In 1453-54 title the manors of Rathmore and Maynooth were disputed between the Butlers of Ormond and the FitzGerald family. The 5th Earl of Ormond, then Lord Lieutenant, supported his family's claim.