In the mid 19th century Lieutenant Colonel Thomas M. Peers Williams held an estate in the parishes of Dysart and Taghmaconnell, barony of Athlone, county Roscommon. In the 1870s he owned 3,062 acres in county Roscommon. His address was Middlesex, England. Lieutenant Colonel Thomas Peers Williams was a grandson of Thomas Williams of Anglesey and Catherine Lloyd. His seat is recorded as Temple House, Great Marlow, Buckinghamshire. His son Owen Lewis Cope Williams married a daughter of St George Francis Caulfield of Donamon.