Thank you for your post to the Ireland Reaching Out message board. The community based website Historic Graves has a number of graveyards all over Ireland on its site. The Old Moygownagh graveyard is one of them. https://historicgraves.com/graveyard/old-moygownagh/mo-moyo
In addition, there is a local historical society in Moygownagh and they may be of some assistance to you with your research. One of our volunteers is active with this group and I will forward this post to him for his reference. The website for the historical society is: https://moygownagh.ie/north-mayo-historical-society/
If you have any further questions, please let us know.