Thomas Bermingham Daly Henry Sewell was a son of Elizabeth Bermingham and Thomas Bailey Heath Sewell and grandson of Thomas Bermingham 1st Earl of Louth and Baron Athenry. His claim to the baronetcy of Athenry failed in 1800. At the time of Griffith's Valuation the Sewell estate was one of the principal lessors in the parish of Athenry and the representatives of Colonel Sewell also held land in the parishes of Clonbern, barony of Ballymoe and Dunmore, barony of Dunmore. Thomas Sewell's had 4 daughters who married Sir William Edward Leeson (who held 710 acres in county Galway and 230 acres in county Roscommon in the 1870s), General Marcus Beresford (one of their daughters married George Brydges Rodney), George Drummond Earl of Perth and Melfort and the Reverend Solomon Richards, whose representatives held 2,544 acres in county Galway in the 1870s.
National Archives of Ireland:
Baker, Ringwood & Gordon, solicitors' collection, includes rental of Quansbury & Bermingham estate of Mrs Elizabeth I. Rodney, near Athenry, 1897. Small Accs. Index 105, M.4471(48)
National Library of Ireland:
Estate records of Denis J. Kirwan and Sons, land agents, Tuam, mid 19th - mid 20th centuries, includes ledger of rent receipts for the Quansbury & Bermingham estates 1855-1870, 1887-1905, 1905-1921 (Mrs Rodney & others) & a Day Book 1877-1894, with other accounts . Kirwan of Tuam & Dalgin, Collection List 142