Fearfeasa Ó Maol Chonaire, co-compiler and scribe of the Annals of the Four Masters, fl. 1620s-1640s.
Ó Maol Chonaire was a member of the Ó Maolconaire brehon family of north County Roscommon. A member of the Sliocht Pháidín, his genealogy was Fearfeasa mac Lochlainn mac Séan Ruadh (died 1589) mac Lochlainn mac Paidín Ó Maolconaire (died 1506). He was thus closely related to Muirgheas mac Pháidín Ó Maolconaire (died 1543) and his descendants, Fláithrí Ó Maol Chonaire (died 1629) and Muiris mac Torna Ó Maolconaire (died 1645).
It has been suggested by Eoin Mac Cárthaigh that Fearfeasa's lands were in the townland of Creta, parish of Kiltrustan, beside that of his father, Lochlainn, who lived in Lisheen townland. Páidín Ruadh Ó Maol Chonaire, who retained two-thirds of his lands in Ballymulconry in the 1650s, may have been Fearfeasa's brother.
As a young man, he participated in the compilation of the Annals of the Four Masters, working with Mícheál Ó Cléirigh, Cú Choigcríche Ó Cléirigh, Peregrine Ó Duibhgeannain and other assistants. He is identified by Bernadette Cunningham as the scribe of hand E in the autograph of the Annals of the Four Masters. He participated in the compilation of the years up to 1333 with Ó Duibhgeannáin, the Ó Cléirigh's writing the rest of the book to 1616.
Fearfeasa strenuously opposed Tuileagna Ó Maol Chonaire, whose criticisms of the work of the Four Masters prevented its publication in the 1640s.