Talk:John M. Hobson

Is this adequate sourcing for the claim that he is descended from the other famous John Hobson?
John M. Hobson is the great-grandson of fellow economic historian and international politics expert, [John A. Hobson]. Is this a valid source: https://eh.net/book_reviews/selected-writings-of-john-a-hobson-1932-1938-the-struggle-for-the-international-mind/ ?