I am tracing David Zenner b1819 who appears on later census in Northumberland at Newcastle upon Tyne. The family connection is son Martin Zenner B1849 Newcastle upon Tyne. Martin's son David CarterZenner B 1878. This David Carter Zenner was my partner's grandfather. The census of 1871 etc show both David and Martin born in Bavaria. But there is a David Zenner shown born in St Andrews Newcastle. But David Zenner B 1819 was definitely born in Bavaria.Any help appreciated.