Complex sentence: These were Anglo-Irish families of the Anglican Church of Ireland, whose English ancestors had settled Ireland in the wake of its conquest by England and colonisation in the Plantations of Ireland, and now owned most of the land.
Split into simpler sentences: These were Anglo-Irish families of the Anglican Church of Ireland. Their English ancestors had settled Ireland in the wake of its conquest by England and colonisation in the Plantations of Ireland, and now owned most of the land.