Mr Domino

Having a surname like 'Donnan' can make life quite difficult for the children I teach. I answer to anything from'Mrs Donna' to 'Mrs Donald' and everything in between.
However, I have never been called 'Domino' before, until today. Not even 'Mrs' Domino either. 'MR DOMINO!!!'
Honestly....
I'm wondering if they're thinking of spotty game pieces or pizza delivery people. Perhaps it's best not to know.