Crom a Boo

Croom or Crom Castle, also called the Castle of Crom, is a historic castle in the town of Croom, County Limerick, that is notable for its occupation as one of the principal residences of the Kildare branch of the FitzGerald dynasty. Their ancient war cry and motto "Crom a Boo", or in Irish "Crom Abu" or Crom forever, comes from the strategic fortress. Before the FitzGeralds it was the site of an earlier fortress of the O'Donovans.

It is located on a strategic bend in the River Maigue, hence the name Cromadh, or "Bend in the River".

The territory in which Croom lies was up until the period of the Norman invasion of Ireland the domain of the ancient Uí Cairpre Áebda (Cairbre Eva), of whom the O'Donovans were the leading family. The Ui Chairpre were a member of the larger regional kingdom of the Uí Fidgenti, the remains of which were at this point sandwiched between the Kingdom of Desmond to the south and Kingdom of Thomond to the north, rivals of each other. The Uí Fidgenti were pressured by Domnall Mór Ua Briain in 1178, but some O'Donovans remained in the area, and according to Samuel Lewis in his 1837 Topographical Description of Ireland, one Dermot O'Donovan erected the first known fortress at Croom sometime during the reign of John of England, or perhaps shortly before. According to Lewis this was to secure the country which they had recently taken from the MacEnirys (their Ui Fidgheinte kinsmen). But the lineage of the O'Donovans is associated with Croom much earlier: in a manuscript dating from the 1130s, where they are mentioned in the Caithréim Chellacháin Chaisil. In this instance, an O'Donovan ancestor, Uaithne mac Cathail (circa 960 a.d.), is mentioned and associated with Cromadgh, the spelling for Croom in use in the mid-12th century.

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