I've just logged on to this site and found that we may have a mutual relation. My great, great grandfather was Daniel Zipkia.
I think the Zipkia you were concerned with was the same Daniel who married Susan Bennett? They had a child called Susannah Zipkia (31/08/1856 Limehouse, London) who married George Grout on 19/10/1873 in Bethnal Green.
Does any of that sound correct?
I'd be very interested to know what you have found out about Daniel, Susan Bennett and Susannah if so.