Conversation so far:
What year did Mary Shelley die?
1851
Was Mary Shelley married?
Yes, to Percy Bysshe Shelley
How did Mary Shelley die?
She died at the age of fifty-three from what her physician suspected was a brain tumour.
Where did Mary Shelley die?
At Chester Square
Where was Mary Shelley buried?
St Peter's Church, Bournemouth
Did Mary Shelley have any children?
Yes

Question: What was her son's name?
Self-contained rewrite: What was Mary Shelley son's name?