Trying to find out where in Ireland Daniel and Mary came from. They are on several UK census records from 1861 onwards living in Gateshead, Durham England.
The surname shows as Cassiddy and later as Cassidy.
I estimate they were borm in 1823 and 1831.
Looks like they had a connection to the O'Neil family too, also in Gateshead.
Would welcome tips on which sites to try to get emigration records (Ireland to England) and also which sites to try for births and marriages as unable to find them on this one.