Hi,
I have a copy of the Account Books for Wm M. Culleny deceased, as of 9 March 1865, Sussex Co., DE (he was a shoe maker.) That list includes Isaac Short.
Another listing for the goods sold at auction for James R. Culleny deceased,(Sussex Co., DE) as of 6th July 1830 lists a George Short who purchased 1 hatchet.
Another name on the auction for Wm. Culleny in March of 1865 could be John J. Short. But it is hand written and I'm not 100% sure. BUT again, they may be on the Census.
Best regards,
Mary in Alabama