Analysis of information sources in references of the Wikipedia article "Irish orthography" in English language version.
... the corresponding Irish Gaelic word is 'ge/ar' (slash indicating an acute accent on the previous vowel).... ... the later spelling of the patronymic, which I've also recast in its feminine form, is 'ni/ Chlu/mha/in'.[Further examples in the next comment by Heather Rose Jones, a significant voice in SCA heraldry.]
In September 2014, members of the public and other interested parties were asked to make submissions regarding An Caighdeán Oifigiúil. An Advisory Committee was also established, which worked tirelessly for a year and a half to identify issues and to make recommendations. The result of this work is the new edition of An Caighdeán Oifigiúil, published by the Houses of the Oireachtas Service in 2017.