The song is believed to have been composed by Mícheál Óg Ó Longáin, who is known to have composed Maidin Luan Cincíse, another beautiful song about the 1798 Rising. At this time most Gaelic nationalist intellectuals seem to have been supporters of Jacobinism but Ó Longáin was without reservation a Republican, a movement the leaders of which were nearly all descended of colonist settlers and planters. For this reason there are very few original Republican songs in Irish from the period though most of the Rising participants in Mayo for example would have been Irish speakers (and most not even bilingual, probably).

The songs by Ó Longáin are also remarkable for being from an actual participant and some also written very near to the time of the Rising. He was on the run in 1799 and may have composed some at that time.


https://www.dib.ie/biography/o-longain-micheal-og-michael-long-a6394