Thank you for that information.' Find my Past' website must have his age wrong! If I can rule him out as being the family member who emigrated then it looks as though the Ebrington Terrace family could indeed be the correct one. This William was supposed to have died age 50 during WW2. Do you have any access to the census for 1901 because if I could recognise the family unit definitely, I will have more chance of following the trail and finding the marriage of the parents and the birth of mt grandma Annie. Also it means that if the brother William (Billy) served and survived WW1 there may be a record of his service which may give some clues though many of these records have been destroyed - worth a try though?
I can't thank you enough for your help. I had really reached a brick wall before.