Hi Bernice. Thanks for replying to my posting. I'm afraid I don't know enough about the KIDDIE surname to answer your question. It does seem possible that the name KIDDIE, KIDDY and MCKIDDIE all derived from the same surmname originally, especially as Mc or Mac means son of... The furthest back I have got on my branch of the KIDDIE family tree is ROBERT KIDDIE born about 1810 from the Arbroath area. I have yet to discover whether his ancestors were also from this area or somewhere else. So far I haven't made a link between my branch of the KIDDIE tree and the name McKIDDIE but I guess it may be possible.