Brian Magauran, the Fourth, b.1592 was chief of the McGovern Clan and Baron or Lord of Tullyhaw barony, County Cavan from 1622 until his death some time after 1628.
A survey taken at Ballymagauran in August 1622 stated that- "Brian Magauran hath 1,000 acres in which is a bawn of sodds and within it a stone howse thatched, with chymneys and a part of it lofted.
An Inquisition of King Charles I of England held in Cavan town on 4 October 1626 stated that Phelim Magawrane died on 20 January 1622 and his lands went to his son Brian who succeeded him as chief.
Sir William Petty’s Down Survey map of 1659 shows the castle in the townland of Dromkirke with inscription "Stone house in repair".
If the Spaniards came the natives would rise and take Portora, Castleton, the Castle of Tully, and Sir John Dunbar's house.
Brian signed his name as Breyn Mc Gauranes on a 'Petition of the inhabitants of Cavan to the lord deputy and council, 8 July 1629'.