Early History

The earliest reference to the name in England is  William Cass in the Essex county pipe rolls in 1200. Other recordings include Elyzabeth Casye, who married William Kendricke at St Dionis Backchurch, London, on August 27th 1564, whilst John Cass of Dalkeith, Scotland was summoned before the Privy Council for Scotland in 1566. The first recorded spelling of the family name is shown to be that of Roger Cass,which was dated 1130, in the Registrum de Dunfermelyn, during the reign of King David 1st of Scotland”, 1124 – 1153.

The first occurrence that I found on the name in Ireland is in the Calender of Ormond Deeds circa 1277. Quit claim by William Cass to Thomas de Lega in Corbali, Quit claim John son of William to Thomas de Lega in Corbali.

Feb 1337, Grant by William Cass to James Le Botiller, Earl of Ormond of lands etc. in Crossedermore

Calendar of Ormond Deeds vol. i 1172–1350,

375, Nicolas Casse in Thurles awarded 20d.(pennies) from Thomas Brit for not keeping his pledge.

1375, William son of Nicolas Casse:  in Clonmel, forfeited 12d.

1375, William Casse in Clonmel, forfeited 12d.

1402   William Casse: Witnesses deeds and grants

about 1400,   Walter Casse in Clonmel, listed as participating lawyer in that day’s hearings

24 July 1416



Calendar of Ormond Deeds vol. iii 1413–1509,Irish Manuscript Commission


13 March 1575, Will in English of Laurence Casse of Dublin.

Calendar of Ormond Deeds vol. v 1547–84, Irish Manuscript Commission

Calendar of Ormond Deeds vol. v 1547–84,
Irish Manuscript Commission


One of our earliest surviving record sources is the so-called fiants of the reign of Elizabeth the First’ The originals were lost in the Four Courts Fire in 1922 but they have been indexed and published. These were warrants to the Court of Chancery in Ireland, which was the authority for the issue of letters patents under the Great Seal. They dealt with matters ranging from appointments to high office and important government activities, to grants of pardons to the humblest of the native Irish. There are a few individuals called Casse mentioned in the Fiants.

No 1865. Pardon granted to Thomas Casse in 1571

No. 2061.Pardons granted to James and John Cass in 1571

No. 2424, Pardon granted Tho. Casse in 1572

No. 6765. Pardon granted to Rob Casse in 1602.