Conversation so far:
Who was Ian Johnson's (cricketer) family?
Johnson married Lal Park and had two sons.
Who is Lal Park?
The daughter of former Test cricketer Roy Park.
When did Ian Johnson (cricketer) get married?
1942
Did Ian Johnson (cricketer) ever get divorced?
No
Did Ian Johnson (cricketer) have any kids?
Yes

Question: What were their sons names?
Self-contained rewrite: What were Ian Johnson's (cricketer) sons names?