DD has my middle name as her middle name (and no-one else in the family has that name)

DS has DH's middle name as his middle name which is also fil's middle name (apparently it goes back 5 gens, but I was only interested cause it was DH's)

Not sure if we are having anymore, but if we were to have another girl, I would use my Mum's middle name as it is also SIL's middle name, and if we have another boy, I would use Dad's middle name. Only cause we like them and want/wanted to use them.