The word Hullet is a French surname.
It is also derived from the french for Owl.
There are a few ways of spelling it.
Having been born a Tyke I know what the sound
of full blown Yorkshire sounds like and the spelling
has changed over the years probably because people
couldnt read or write and the strong accent of passing
a word on.
Hulet, Hullet, Houlet, Howlet, Owlet,
regards Sandymc