There are two authors called Jonathan Clements. The first, born in 1971, is a British author and scriptwriter; the linked Wikipedia author page is about him. The other, born in 1962 or 1963, is a financial columnist; the linked Official home page is his.
Actually, there is at least one other Jonathan Clements, who was writing pulp paperbacks in the 60s.
Split authors include:
# Jonathan Clements, 1971- author of The Anime Encyclopedia
# Jonathan Clements, (personal finance) 25 Myths You've Got to Avoid If You Want to Manage Your Money Right