Conversation so far:
Where was Hugh Trumble born?
Hugh Trumble was born in the inner Melbourne neighbourhood of Collingwood, Victoria in 1867.
When was Hugh Trumble born?
Hugh Trumble was born in the inner Melbourne neighbourhood of Collingwood, Victoria in 1867.

Question: To who was he born?
Self-contained rewrite: To whom was Hugh Trumble born?