<Tr> <Th_colspan="2"> Nursery rhyme </Th> </Tr> <Tr> <Th> Published </Th> <Td> 1798 </Td> </Tr> <P> "Rub - A-Dub - Dub" is an English language nursery rhyme first published at the end of the eighteenth century in volume two of Hook's Christmas Box under the title "Dub a dub dub" rather than "Rub a dub dub". It has a Roud Folk Song Index number of 3101 . </P> <P> This rhyme exists in many variations . Among those current today is: </P>

Where did rub a dub dub come from