Shane Reid, 73, died at his home on Hilderthorpe Road on November 27.
The circumstances of his death are not thought to be suspicious, however, officers have so far been unable to trace his family.
A spokesperson from Humberside Police said: "We hope that this appeal will help us find anyone who knows the whereabouts of his family.
"If you know of Shane Reid’s next of kin or family please call the non-emergency number 101 quoting log 126 27 November 2019."