Old Man of the Moon
(The). The Chinese deity who links in wedlock predestined couples.
(See Man In The Moon.)
“The Chinese have a firm belief in marriages being made in heaven. A certain deity, whom they call the `Old Man of the Moon,' links with a silken cord all predestined couples.” —J. N. Jordan: Modern China (Nineteenth Century, July, 1886, p. 45).
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894