« Reply #7 on: Friday 01 April 11 18:41 BST (UK) »
Still in Catholicism children take a christian name at confirmation which is recorded against their baptism - you must be confirmed before you are married so records will be checked.
My children have one name on the civil register; two on baptism and one is about to be confirmed aged 12 and will take a third Christian name. However they only use the name shown on the civil register as being theirs.
In Ireland with many people having been named after relatives you can find cousins John Michael (Michael being his father) and John Pat (Pat being his father) where Mick and Pat are brothers for example.
Or as mentioned by mshrmh where they are named after the relative as John Michael but the John is never used so by the time they come to marry they may be oblivious to the fact the John was ever used!!
I have many of these in my family - finding them on the civil register is a nightmare. Up until recently (I am open to correction if there are changes) but legally in Ireland if you used a name for two years you could claim that name and apply for a passport etc
Kearney & Bourke/ Johns & Fox/ Mannion & Finan/ Donohoe & Curley
Byrne [Carthy], Keeffe/ Germaine, Butler/ McDermott, Giblin/ Lally, Dolan
Toole, Doran; Dowling, Grogan/ Reilly, Burke; Warren, Kidd [Lawless]/ Smith, Scally; Mangan, Rodgers/ Fahy, Calday; Staunton, Miller
Further generations:
Brophy Coleman Eathorn(e) Fahy Fitzpatrick Geraghty Haverty Keane Keogh Nowlan Rowe Walder