Catherine Keightley, daughter of Thomas Keightley and Frances Hyde, aunt of Queens Anne and Mary, wife of Lucius O'Brien.
Unknown author<span style="display: none;">Unknown author</span>
History of the O'Briens from Brian Boroimhe, AD. 1000 to AD. 1945, by Donough O'Brien, page 232, <a rel="nofollow" class="external free" href="https://archive.org/details/historyofobriens00obri/page/n275/mode/2up">https://archive.org/details/historyofobriens00obri/page/n275/mode/2up</a>