Complex sentence: The title was held by the Hussey family, who came to Ireland in 1172 in the entourage of Hugh de Lacy, Lord of Meath and became substantial landowners in County Meath.
Split into simpler sentences: The title was held by the Hussey family. They came to Ireland in 1172 in the entourage of Hugh de Lacy, Lord of Meath and became substantial landowners in County Meath.