Lucky
late Middle English (as a verb): perhaps from Middle Low German or Middle Dutch lucken . The noun use (late 15th century) is from Middle Low German lucke, related to Dutch geluk, German Glück, of West Germanic origin and possibly related to lock1.
wiktionary
From Middle English lukky, equivalent to luck + -y. Cognate with Scots lucky(“lucky”), West Frisian lokkich(“lucky, fortunate”), Dutch gelukkig(“lucky, forntunate, happy”). Compare also Danish lykkelig(“happy”), Swedish lycklig(“happy, lucky”), German glücklich(“happy”).
etymonline
lucky (adj.)
mid-15c., of persons; 1540s, of actions or objects, "likely to bring luck;" from luck (n.) + -y (2). Meaning "occurring by chance" is 1590s. Related: Luckier; luckiest; luckiness.
Lucky break is attested from 1884 in billiards; 1872 as "failure or break-down which turns out to be fortunate." Lucky accident is from 1660s. Lucky dog "unusually lucky person" is from 1842. Lucky Strike as the name of a U.S. brand of cigarettes (originally chewing tobacco) popular in the World War II years is said to date from 1871. Its popularity grew from 1935 when the brand's maker picked up sponsorship of radio's "Your Hit Parade."
