Given the prevalence for persons of that name to be female and the noticeable lack of males with the title, it is fairly likely that the Kathryn in question is not a man or male of any kind.
The 'man' has had a sex change operation. When formerly a woman, (s)he contributed the egg and brought the fetus to term in her womb, and thus is the mother. (S)he did not contribute the sperm, and...