@annmarie Brown: I have been looking into the McDonnell family too, I haven't gotten too far, but some comments on this tread have definitely assisted! I am researching Sarah McDonnell (my great great grandmother) who married James Ball in 1875. Her father was Jacobus McDonnell (noted on marriage cert as alive in 1875) with occupation as land servant/ Herd/ land stewart. Jacobus was married to Sarah McDonnell (Nee Moore) and their address from the church record of their daughter was "Celbridge". It is my understanding they lived at 17 Lwr Sherrard Street, Dublin around 1840s (as this address was given at the time of Sarah's marriage to James, and also the address given of her sister Maria at her marriage around the same time). I cannot find marriage or death records for Jacobus/ James McDonnell, however I found Sarah McDonnell (his wife) died in 1894 and her son in law James Ball was present at her death in 9 Millbourne Avenue. Hope this helps!