Hi,
Sue,

I like it. A bit of fun can be great, and now I have a brainteaser for you. My Great x 27 grandmama was born in 1024 AD, married on 29 Jan 1044 and lived until (I think) 1072. If I were to meet her sometime, it is reasonably straightforward how one would address her, but her bigger sister was born two years before, so what is the correct form of address to your Great x 27 Grandmama's big sister ?

(There were three, possibly four girls and five sons, all of the full blood)

Slightly tongue in cheek

Robert