The best information I can find is that it's the name of an area near Manchester. Historically the name has very close ties to the north of England, especially Lancashire (the only Horrocks I ever knew personally was from Lancashire, and he said the name was very well known there.)
There is a lovely website for Horrockses, well worth a look if you haven't found it already. It contains a lot of speculation on the origin of the name; apparently it may be an Old Norse word meaning "pile of stones." Or it may be a term connected with sailing boats. In any case, it may be a good place to continue your search - I'm afraid I couldn't find out anything more.
The site is at
www.busipages.com/horrocks
There is a lovely website for Horrockses, well worth a look if you haven't found it already. It contains a lot of speculation on the origin of the name; apparently it may be an Old Norse word meaning "pile of stones." Or it may be a term connected with sailing boats. In any case, it may be a good place to continue your search - I'm afraid I couldn't find out anything more.
The site is at
www.busipages.com/horrocks