Hi. I think I've replied to you before on a different topic, but I'm doing research into St Cuthbert's School and Church, and yes, the early records are at the Tyne & Wear Archive. If you are quite patient and methodical you could probably chase the family through the records from baptism and through school, wedding and death if the family were Catholic and stayed in the area. The index of baptisms for 1847 to 1939 are on microfiche, C/NS14/2/ vols 1-5, and yes, the earlier ones are in Latin, but fairly basic and easy to understand. Marriage and death records are also in the C/NS14--- range, so once youv'e found one the others are easy. Contact me if you can't get to the archives and need some info--- I might already have it or know where to put my hands on it quickly.
regards, Sandra