Iehiro Tokugawa ( and , Tokugawa Iehiro ) (born February 7, 1965) is an author, translator, and the heir of the main Tokugawa house. Members of his Tokugawa clan ruled Japan as Shoguns from 1603 to 1867. His great-great-grandfather was the famed Matsudaira Katamori of Aizu, and his maternal great-great-grandfather was Tokugawa Iesato, the sixteenth head of the Tokugawa clan.
Can we infer the following?
Iehiro Tokugawa has never been married
It's impossible to say