Complex sentence: The Lloyd family inhabited Plas until 1767, when the Meares family, of Eastington acquired it; from them it passed to the family of Morris who were bankers in Carmarthen.
Split into simpler sentences: The Lloyd family inhabited Plas until 1767, when the Meares family, of Eastington acquired it. It then passed to the family of Morris who were bankers in Carmarthen.