Citizenship doesn’t apply to your father place of birth, unless Ted also was born in Cuba.
Different countries have different rules. Until a few months ago; Ted had dual citizenship with the US and Canada.
He gave up any right and claims of being a Canadian though.
Cuba had (probably still has) a law like the one in the US. Born abroad of one citizen parent results in citizenship in Cuba, at birth.
Depends on the laws of the country.