The Thomas baronetcy, of Garreglwyd in the County of Anglesey, was created in the Baronetage of the United Kingdom on 5 July 1918 for Robert Thomas. He was a ship and insurance broker and also represented Wrexham from 1918 to 1922, and Anglesey from 1923 to 1929, in the House of Commons.
Thomas baronets, of Garreglwyd (1918) Sir Robert John Thomas, 1st Baronet (1873–1951) Sir William Eustace Rhyddlad Thomas, 2nd Baronet (1909–1957) Sir (William) Michael Marsh Thomas, 3rd Baronet (1930–2009)
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