Tuileagna Ó Maol Chonaire (fl. 1637) was an Irish historian.
Tuileagna was a member of the Ó Maolconaire Brehon family, but it has proved difficult for researchers to uncover more detail about him. His antagonist, Fearfeasa Ó Maol Chonaire, said in a poem that his father's name was Seanchán. He might be identified with the Tuileagna Ó Maol Chonaire who was a student at the University of Louvain in 1625, or a student at the Irish College at Salamanca in April 1610, who was aged about twenty-five.
He is usually thought to have been the Tuileagna Ó Maol Chonaire recorded living in Madrid some years later. In March 1658, a man of that name authenticated a genealogical transcript, identifying himself as seancha coitcheann Éireann/general historian of Ireland. In September 1659, the same man transcribed a tract on grammar and prosody for Father Patrick Tyrrell, OFM, indicating that the man in Madrid had links with the Irish Franciscans, perhaps himself being a member of the order.
A later Tuileagna Ó Maol Chonaire added a note to Laud Misc 610 in Oxford, 1673, but his identity is unknown. An earlier Tuileagna Ó Maoil Chonaire, was a poet alive about 1585.
In 1637, upon Mícheál Ó Cléirigh's return to Louvain with the finished autograph of the Annals of the Four Masters, Tuileagna publicly expressed concerns on four points of detail in Genalogiae regum et sanctorum Hiberhiae and the Four Masters text, stating that the points cast a slur on the status of Connacht. He furthermore stated that Conchobhar Mac Bruaideadha withdrew his approbation in public following a general chapter of the Franciscans in Thomond in 1638, while stating that Flan Mac Aodhagáin had temporarily withdrawn his approbation in 1637 until the disputed points were resolved.