Hi Juliefay,
I have Dellows in my tree, and I googled the name, and came up with a really interesting web page "The Deller Family". Someone (I'm at work, and don't have all the info at hand), has done a really good job of following the name in England. My Dellow family came from Hertfordshire to Australia in 1860s, and they are there on that site.
The family names I recall are Dellow, Deller, Dellar, and there are probably more.
Good luck, I hope you have success with this.
Muppetprincess