I too am looking for info on the Leonard family - My only informaion is going back to Martin leonard B 1833 approx in Roscommon although some census list this as galway. I believe his father to be Michael Leonard but thats as far as I can go. I do have a possible link to a Henry Leonard living 2 doors away in 1861 in Bilston, Wolverhampton but do not know if they are related - possibly brothers. If you have any ideas or can help please let me know.
Man thanks, Ian Leonard.