Complex sentence: He was head of the prominent Talbot family of Malahide Castle; his descendants acquired the title Baron Talbot de Malahide, and he himself was recognised as Lord of Malahide, although this was not a hereditary title.
Split into simpler sentences: He was head of the prominent Talbot family of Malahide Castle. His descendants acquired the title Baron Talbot de Malahide, and he himself was recognised as Lord of Malahide, although this was not a hereditary title.