The Tuite Baronetcy, of Sonna (An Sonnach) in the County of Westmeath, is a title in the Baronetage of Ireland.
At the time of the Norman Invasion of Ireland, Henry II granted to Hugh de Lacy, 1st Earl of Ulster, the lands of Ó Maoilsheachlainn, king of Meath in return for the service of 50 Knights.
De Lacy conferred on the Tuite family the castle of O'Casey (Irish Ó Cathasaigh), chief of Saithne, now "Sonnagh," in Westmeath.
This senior branch of the family became Protestant in order to hold on to their lands and in the early twentieth century moved to Britain.
The Sonnagh estate is today in ruins outside the town of Ballynacargy in County Westmeath.