Can a person with an honorary doctorate be called doctor?

In some cases, yes.

It depends on the institution that awarded the honorary doctorate and their specific policies. Some institutions allow individuals who have received honorary doctorates to use the title of "Doctor" before their name, while others do not. It is always best to check with the institution that awarded the honorary doctorate for their specific guidelines.

In general, honorary doctorates are awarded to individuals who have made significant contributions to a particular field or area of study, but who do not necessarily hold a traditional doctoral degree. The title of "Doctor" is used in these cases to honor the individual's achievements and contributions, but it is important to note that it is not the same as a traditional doctoral degree.