Many RC children in my Australian family and no doubt other countries were baptised with the Latin derivative of their real name - even though the Anglicised name was always used after that. Oliverium and Olevia were probably plain Oliver. In one of my families, Guillaume = William. Nancy > Well this is one time where I transcribed the parish register and note it to > be down as Oiverium which as you are aware is Latin, in fact most of the > Catholic register was in Latin,