E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Accidental good fortune. (Dutch, luk; German, glück, verb glücken, to succeed, to prosper.)
Down on ones luck. Short of cash and credit. Not in lucks way, not unexpectedly promoted, enriched, or otherwise benefited.
Give a man luck and throw him into the sea. Meaning that his luck will save him even in the greatest extremity. Referring to Jonah and Arion, who were cast into the sea, but carried safely to land, the one by a whale and the other by a dolphin.