Complex sentence: Hart's patrilineal great-great-great-great-grandfather was Sir Percival Hart Dyke, 5th Baronet (1767--1846), while her distant cousin, the 10th and present baronet, Sir David Hart Dyke, lives in Canada.
Split into simpler sentences: Hart's patrilineal great-great-great-great-grandfather was Sir Percival Hart Dyke, 5th Baronet (1767--1846). Her distant cousin, the 10th and present baronet, Sir David Hart Dyke, lives in Canada.