Before she was married, Fionnghuala had a poem dedicated to her by Tadhg Mór Ó hÚigínn, her father's tutor and a member of the famous O'Higgins poetic family.
[1][2] She then married Brian ‘Breaghach’ Mág Samhradháin, chief of the McGovern Clan of Tullyhaw, County Cavan, from 1272 to 3 May 1294.
Their children were Giolla Íosa (d. 1322), Ferghal Ruadh (d.1322) and a daughter Gormlaidh who married Matha O’Reilly (d.1304).
The Annals of the Four Masters give her death as 1310- Finola, daughter of Manus O'Conor, died.
The Annals of Loch Cé 1310 state Finnghuala, daughter of Maghnus O'Conchobhair, quievit in Christo.