#1 Robert Kinloch Massie (b. 1929), Nicholas and Alexandra.
#2 Robert Kinloch Massie, Jr. (b. 1956), Son of #1; Loosing the Bonds.
(The Library of Congress lists only two authors called Robert Massie, both of whom are called Robert K. (Robert Kinloch) Massie, so it is correct to keep all these author pages combined.)