Does the DC you quoted mention spouse/s or children? 4 of Frederick and Ellen's children were bn after 1901?
You would need to look at the death certificate to see the details of his family, etc.
From the parents names and place it looks correct.
His spouse, Ellen was born 1844 and died in 1895 so children born after 1901 not possible.
Which children do you think were born after 1901?
I suspect the names someone has attached to the posted photo may be incorrect.
I agree the older man looks into his 80s, but the younger man is more than 40 more like in his 60s. (See the hanging jowls and loose skin around his neck)
If I am looking at the correct family
Frederick Robinson was born 1837 in Great Shelford, Cambridgeshire to Joseph Robinson (a carpenter) and Elizabeth Stearne
In 1854 Sydney, Frederick married Emma Durrant :
Children Frederick R. 1857-1913, Richard 1859-1897, William Edward 1862 1945
A second marriage in 1873 for Frederick to Ellen Mary Gumley, nee Condon:
Children Walter Robert 1874-1934, Charlotte Louisa 1875-1940, Percival Austin 1878-1949