I am often asked what do we do when we reach a brick wall in our Irish families about 1840/1850?
I have begun to explore a new option. (for me in anycase)
We know that many Irish people began their journey to America and elsewhere via Liverpool. Some of them stayed in Liverpool, at least for a time.
The 1851 Census for Liverpool (England), via ancestry, gives a total of 67,291 Irish born people living in Liverpool. The majority give no other birthplace but Ireland. However there are exceptions.
For example in Paul Street, Liverpool, James Brennan, born about 1796, is recorded as having been born in Mayo, Ireland. James was a lodger in the house of Thomas King born about 1824 in Clare, Ireland. Thomas King's wife Irene was also born in Clare. Ann & John Portill, also born in Clare and described as relatives of Thomas King are also resident in the household. Of the 10 people living in the household, only one was born in England. In fact there are many Irish families resident in the area.
I highly recommend a search for your missing family in the Liverpool Census of 1851 and 1861.
I'm a Brennan with clear roots in Clawinch Island, Co. Longford (on the Shannon) Brennan Family Clawinch, Co. Longford and possibly in Kilteevan, Co. Roscommon. As a child my father's people told me that our family came from Kilkenny originally and that Cromwell threw us out. This story has intrigued me all my life and of late I have begun to collect information about Brennans the world over. If you have Brennans in your family, you are cordially invited to join me and maybe we will get to the root of this family story, or maybe not...