Just for info: This is the child
Births Jun 1909
HEWSON Douglas McDonald Sculcoates 9d 127
In 1911 he is 1yr and 10 months with his mother Marion Hewson in Sculcoates - a widow. both born Hull
She had been married 5 years and had 3 children but only Douglas had survived by 1911. She seems to be some kind of shop keeper or shop worker.
I had a look but can't see a possible marriage for a "Marion" and "Hewson" in about 1906. Or a likely marriage for a Thomas Henry to "Marion".
OREO - did it give an occupation on the birth cert or did it just say " "deceased"?
If son was born April-Jun 1909 then he must have died in the 9 months before that so looking for a death after April 1908. I couldn't see anyone likely on the area.
Had a quick look at Scotland's people but didn't come up with much.
Have you been able to identify the other two children who were born and died? Maybe their birth and death certificates may be of help.
I saw a Marion Hewson born in 1906 and thought she was a likely candidate but then saw a Marion Hewson alive with a family in 1911 - so perhaps not.

Milly