According to Burke’s Landed Gentry of Ireland, the earliest Seymour ancestor about whom we have any reliable information is Thomas, who was born at Low Park in Co Galway in about 1680. Burke tells us “During the reign of William III [ie William of Orange, sometimes known as ‘King Billy’ 1689:1694], two brothers went to Ireland as officers in the English army, and Eyre around 1824. This family were to remain in possession of the castle until the early part this century. Mrs. Hale, a relative of the Seymours, inherited the estate which was somewhat reduced at this time a large portion having been acquired by the Irish Land Commission. She leased the castle to a family named Smiths and also to the infamous Major Belassy. The Belassy family arrived in Ballymore Ballymore Castle viewed from the Seymour mausoleum Sitting room in the newer part of Ballymore Castle The Seymours | 101 settled in Connaught. From the elder, Thomas, derive the Seymours of Ballymore Castle, and from the younger, John, the Seymours of Somerset, Co Galway. An elder brother of these died without offspring, leaving his property to his only sister, who married Colonel Sadlier. Thomas Seymour married Belinda, daughter of A O’Madden of Clare Madden, Co Galway, and had one son, Joseph, his heir, and two daughters. Catherine married Samuel Harrison of Spruce Hill, Co Galway, and Belinda married Robin Cooke of Galway”.
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